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Front sprocket blocked - how to remove?
Hi guys.
I'm writing from Italy. This morning I’ve tried to change the old front sprocket with new, on my F3S 2018. I've got 29000km on the F3. The only problem that I have is that I can’t get the front sprocket out, because of the rust. We tried with a specific lubrificant, with an extractor tool, and with a “phon” (hot air gun). Have you a different solution?
I'm in a panic and don't know how to fix the situation. We've broken a piece off the front sprocket, a piece of the outer lip. The Spyder is now at my friend's motorcycle repair garage.
Thanks for anyone who can help me and sorry for my English.
Last edited by Peter Aawen; 02-16-2022 at 06:40 PM.
Reason: speocket = sprocket ;-)
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Active Member
What ussualy happens is the pulley will have spline left on the inside of pulley that catches the spline on the shaft. I used a gear puller to get them off. You can possibley hold the shaft still and rotate the pulley to get the groove to line up.
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Active Member
Thanks for your answer.
You mean that the front sprocket is slipped slightly on the drive shaft?
Because I've checked, but everything is in the right place.
But there is a lot of rust. It seems they have welded together because we can't get them out.
We've applied a lot of power with a gear puller, so much that we broke the side lip of the sprocket.
Last edited by Peter Aawen; 02-16-2022 at 06:42 PM.
Reason: .
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Very Active Member
At the same time you are using the gear puller, apply heat with a propane torch or heat gun to expand the pulley. That should help to loosen its grip on the shaft and loosen the corrosion inside. Don't do it too long and heat the shaft too.
Your English is a lot better than my Italian, even though I have been to your country motorcycling the Alps and Dolomites. Where do you live?
Ours is a red, black and chrome 2017 F3 Limited. Bought new in 2/2019. The avatar is my first bike back in 1952, a Simplex Servi-Cycle. Photo taken at the Barber Museum.
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Very Active Member
Try a "penetrant" like Liquid Wrench or similar... Penetrants have the ability to "walk' themselves into the rusted areas that are not reachable... Let this stuff soak overnight. Might want to reapply after 4-6 hours then let sit... You may still need to use heat on it while pulling with the gear puller. A "heat gun" won't have enough BTU to do this type of thing... A SMALL butane torch carefully applied to the PULLEY, NOT the shaft should do it. You want the pulley center to expand not the shaft.... Best of luck!
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Agreed on the penetrant. The very best penetrant is home made. It's 50/50 transmission fluid and acetone. I saw a very good video testing every brand of penetrant plus that one and to took far less torque to undo the equally corroded bolts in the test.
hypurone...I mentioned the heat gun in case he doesn't have access to a torch. It's better than nothing.
Ours is a red, black and chrome 2017 F3 Limited. Bought new in 2/2019. The avatar is my first bike back in 1952, a Simplex Servi-Cycle. Photo taken at the Barber Museum.
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Buon Giorno! If there is "rust" then there is wear in the splines of the sprocket. The splines on the shaft are narrower than the width of the sprocket: that will result in a narrow web of unworn spline on the very inside of the sprocket that must be aligned with the shaft splines to get it off the shaft. That happened on one of ours.
To facilitate alignment, I removed the retainer bolt, then placed a spacer under the head of the bolt, and screwed the bolt back in place. High torque is not required. Now the bolt head can be used to stabilize the shaft while trying to align the sprocket on the shaft. Looking at the sprocket, the shaft applies power in a CCW direction: the sprocket likely needs to rotate in a CCW direction to align the unworn sprocket splines with the shaft. If the sprocket is frozen on the shaft, then a penetrant should aid in its release. The retainer bolt head can be held with a box-end wrench and the sprocket can then be manipulated to try for the alignment. If the sprocket splines are not aligned, a gear puller will not be able to remove the sprocket.
I would be very cautious applying a propane/butane torch to heat the sprocket: there is a rubber seal on the shaft and lots of electronics around the sprocket that could be affected.
I posted this a while back: https://www.spyderlovers.com/forums/...nt-wear)/page2
Last edited by pauly1; 02-16-2022 at 01:00 PM.
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Active Member
I am going to give a radical solution, since you already have a new sprocket, if all the above advice do not take care of the job, my solution would be to try and saw the sprocket open just about to the splines on the shaft, then support the sprocket on a block of wood, and split it open, with an old screwdriver and a hammer, be sure to stut the sprocket, else all energy will go into the motormounts...and will definetely cause damage.
This is a last resort solution, if all elese fails, no guarantee
the funniest thing about this particular signature is that by the time you realise it doesn't say anything it's to late to stop reading it........
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thank you so much guys for your valuable advice. we tried with different extractors but it didn't move in the slightest. we also applied heat to the front sprocket but not excessively, for fear of creating problems At the electronics. in the end, we chose to drill holes in the front half of the sprocket and we managed to remove it. it's like you've cut it. tomorrow we will proceed with the second half, which is incredibly still attached to the crankshaft. they seem welded. never seen anything like it. again, thanks to everyone for the support.
Last edited by Peter Aawen; 02-16-2022 at 06:44 PM.
Reason: .
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I’m doing this maintenance because this summer I will do over 4000km around the Alps.
Last summer I made a tour of Sud Tyrol, an Alps’s region here in Italy, with Stelvio Pass, Rombo Pass, Pordoi Pass etc…
But Italy is beautiful, especially on a bike.
I live in the middle, near Florence
Last edited by Peter Aawen; 02-16-2022 at 06:46 PM.
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Originally Posted by GabrieleItalia
I’m doing this maintenance because this summer I will do over 4000km around the Alps.
Last summer I made a tour of Sud Tyrol, an Alps’s region here in Italy, with Stelvio Pass, Rombo Pass, Pordoi Pass etc…
But Italy is beautiful, especially on a bike.
I live in the middle, near Florence
My wife and I rode in northern Italy and found the people, the roads, the scenery and the foods to be beyond wonderful. I could go back in a heartbeat.
Good luck with the remainder of your project. I can not stress enough that checking the front pulley SHOULD BE a regular mantenance item. Better to do it too much than too little. Be sure to use a Moly Paste to lube the splines and I do not have a problem with reusing the bolt.
Last edited by Peter Aawen; 02-16-2022 at 06:47 PM.
Reason: Fixed quote display
Ours is a red, black and chrome 2017 F3 Limited. Bought new in 2/2019. The avatar is my first bike back in 1952, a Simplex Servi-Cycle. Photo taken at the Barber Museum.
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Originally Posted by GabrieleItalia
thank you so much guys for your valuable advice. we tried with different extractors but it didn't move in the slightest. we also applied heat to the front sprocket but not excessively, for fear of creating problems At the electronics. in the end, we chose to drill holes in the front half of the sprocket and we managed to remove it. it's like you've cut it. tomorrow we will proceed with the second half, which is incredibly still attached to the crankshaft. they seem welded. never seen anything like it. again, thanks to everyone for the support.
Gabrielle, can you post a photo? It is often better to see a photo of the offending item, even though you have it off, to see just what might have caused it to “weld”. Are you aware of the correct paste to use when reinstalling to reduce the chances of stripping reoccurring?
Pete
Last edited by Peter Aawen; 02-16-2022 at 06:48 PM.
Reason: Fixed quote display
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Yes guys. I’ve already bought the moly paste for the crankshaft and the loctite 243 medium strength for the new bolt that I will torque to 125nm. As soon as I have finished the job, I will post the photos of the conditions in which the crankshaft is. For now I'm waiting to finish the job, just to be superstitious
Again guys, thanks for your support!
Hope to finish tomorrow.
Last edited by Peter Aawen; 02-16-2022 at 06:49 PM.
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If you need to get real serious with the heat expansion of the pulley, then pack dry ice on the end if the shaft for about an hour, then do the heat applied to the pulley only, no heat on the shaft, while pulling. That will give you about double the normal heat expansion you get with just applying heat. We used this method to install or remove shrink fit items. Mostly very large stuff in a mining machine shop where I worked for many years. You can slip a pulley or impeller on a shaft that is several thousandths larger than the hole in the pulley using both heat and cold.
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This may help: https://www.spyderlovers.com/forums/...nificant-wear)
good luck...Regards
Sorry I see you have resolved, IGNORE
Last edited by BMac920; 02-16-2022 at 06:41 PM.
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The Woodlands, Texas
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Originally Posted by Gwolf
If you need to get real serious with the heat expansion of the pulley, then pack dry ice on the end if the shaft for about an hour, then do the heat applied to the pulley only, no heat on the shaft, while pulling. That will give you about double the normal heat expansion you get with just applying heat. We used this method to install or remove shrink fit items. Mostly very large stuff in a mining machine shop where I worked for many years. You can slip a pulley or impeller on a shaft that is several thousandths larger than the hole in the pulley using both heat and cold.
Gwolf...
My dad taught me that one over 50yrs ago. He was a shipboard motor electrician/machinist in the navy and later as a navy contractor. Good for getting bearing races out of cases also. There can be some big motors and supporting drive systems on ships.
Regards,
Don
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Ready for the horror pics!
This job was a pain.
At the end, all is gone fine. Now, I've cleaned all the zone.
This morning I'll check up and test the spyder. I've waited over the night and afternoon to make hard the medium loctite that I've applied on the bolt. Hope I don't do any damage. So stay tuned.
Last edited by Peter Aawen; 02-18-2022 at 10:29 PM.
Reason: I've & I'll ;-)
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Well done GI. Reliability sure ain't Spyder's strong point but folks keep buying them. And as long as they continue to do so at the current rate BRP ain't gunna get their collective knots in a ball over a 'wear item' like the drive pulley. History has shown that to be the case.
The best substitute for brains & knowledge is....................silence.
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Originally Posted by GabrieleItalia
.......
Ready for the horror pics!
This job was a pain.
At the end, all is gone fine. Now, I've cleaned all the zone.
This morning I'll check up and test the spyder. I've waited over the night and afternoon to make hard the medium loctite that I've applied on the bolt. Hope I don't do any damage. So stay tuned.
Those images represent a lot of work, frustration and winning determination! Bravo and thanks for the photos! Regards.
Last edited by Peter Aawen; 02-18-2022 at 10:30 PM.
Reason: Forum Rule 1
2018 F3-L
w/2600mi-2/14/22
- The Ultimate F3 Floorboard
- HeliBars
- 20" MadStad Wind Screen
- Garmin Zumo XT
- ROLO LASER Alignment, Tyler Texas
- Greased Front Sprocket Splines w/TS-70
- Baja Ron Heim End Links
Many two-wheelers and w/40+ years of Riding
The Woodlands, Texas
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Active Member
The photo's show a horrible job, but I think you sorted it well, and as far as reliabilty goes... The spyder is a complex machine, but with proper maintenance, it is a wonderfull machine...
I've had mine for a bit over two yrs now, and other than an oil change and brake pads that wore out within 8000 km's, I've done 16.5000 km's with a big smile on my face
Last edited by Peter Aawen; 02-18-2022 at 10:31 PM.
Reason: rather then = other than ;-)
the funniest thing about this particular signature is that by the time you realise it doesn't say anything it's to late to stop reading it........
Spyder F3s 2019 All Black ( Named it: Brutus)
Carbon Items added, just for looks
Upgraded Shocks Trac-Tive, Rear hi/lo and rebound adjustable, with Hydraulic Pre-Load adjuster
fronts hi/lo and rebound adjustable, custom made by the Trac-Tive Guru's
Swaybar (Ron's)
Tyres Front Michelin Cross Climate+ 175/60-15
Rear, for 2022 still a Kenda, next Yokohama Advan Fleva 205/55R15
Exhaust Bone stock, with a RLS Cat- Delete
Custom ECU-Mapping, rewritten/adapted to my Ridingstyle
Pedalbox, Awesome Upgrade...
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Active Member
Yes guys, a funny way to spend your free 15 hours!��
After this, I’ve re adjust the belt and seems all fine.
The spyder is a really piece of art for me.
Unfortunately not so perfect, but this is my first headache with it from 2020. I’ve buy it used with really low milleage.
I m not afraid about mechanical problems but more for the electrical problems , because here in Italy, customers are completely alone,no one can make extraordinary maintenance and this is why this forum saved me frequently.
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Fantastic job. Thanks for posting and the pictures.
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Originally Posted by Piratezz
............ and as far as reliabilty goes... The spyder is a complex machine, but with proper maintenance, it is a wonderfull machine...
I've had mine for a bit over two yrs now, and other than an oil change and brake pads that wore out within 8000 km's, I've done 16.5000 km's with a big smile on my face
Proper maintenance is important but that's irrelevant when considering the reliability of the drive pulley. I've had my Spyder for 12 years and 100,000km and it is reliable - other folks not so lucky no matter what maintenance has or hasn't been done. Drive pulley failures started soon after Spyder hit the market and continue to this day. BRP issued a TSB way back then about it, which I acted on early and have had no problem. Shame on BRP for leaving this reliability issue unresolved.
https://www.spyderlovers.com/forums/...t+BRP+Bulletin
Bolt torque has since been increased to 110ftlb.
Most stuff is complex these days, but Spyder has a weakness built into it.
Last edited by Freddy; 02-19-2022 at 12:04 AM.
The best substitute for brains & knowledge is....................silence.
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Very Active Member
Originally Posted by Freddy
Proper maintenance is important but that's irrelevant when considering the reliability of the drive pulley. I've had my Spyder for 12 years and 100,000km and it is reliable - other folks not so lucky no matter what maintenance has or hasn't been done. Drive pulley failures started soon after Spyder hit the market and continue to this day. BRP issued a TSB way back then about it, which I acted on early and have had no problem. Shame on BRP for leaving this reliability issue unresolved.
https://www.spyderlovers.com/forums/...t+BRP+Bulletin
Bolt torque has since been increased to 110ftlb.
Most stuff is complex these days, but Spyder has a weakness built into it.
Interesting .. I've been here almost as long as you have .... however my recollection of the Sprocket FAILURE issue is different .... My memory is that it began to occur with increasing frequency with the 15 F-3 ..... Something at BRP changed, either the metallurgy, or installation at the factory, or assembly process used .... possibly all 3 ..... This to me is similar to the DESS issue , almost no problems until 2014. ...... jmho .... Mike
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Very Active Member
Yes , the first few years of production were a concern, then the higher bolt torque seemed to virtually eliminate it until the triple cyl donk hit the road. Memory of history is hit & miss or too short. The evidence is in the TSB - which was generated (the very same month I joined this forum) after 2 years of too many failures.
Last edited by Freddy; 02-19-2022 at 07:38 AM.
The best substitute for brains & knowledge is....................silence.
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