30 tooth front Sprocket

[Lamonster]

anything new?

Worky worky?

http://www.spyderlovers.com/forums/showpost.php?p=243229&postcount=23

 

[Freddy]

Like I said above, mine's still tight. If OEM sprockets are stripping out too, the only conclusion to be drawn is that the bolt isn't tight enough, allowing movement between the sprocket and spline. I don't see belt tension being a cause of this as it's a straight pull on the sprocket - different matter for bearings tho.

 

[Raptor]

There was talk from Mel's awhile back about a 27 tooth gear which would increase low end performance. You may want to contact them and inquire about that.

Just checked and see nothing about the 27 tooth yet. But after seeing Doc's 30 tooth, I think I'll pass!! :yikes:

 

[Freddy]

If it's happening to several OEM steel pulleys, the problem is not the material it's made of but how it's attached/tightened to the shaft.

 

[Freddy]

Update

Mine has now done about 12,000km with the 30T sprocket. I'll be taking it on a 10,000km tour with my sons next month. So to satisfy the nagging concern about the durability of the aluminium sprocket I removed it for a look-see today. The retaining bolt was tight and there was no wear on the splines. I had applied moly grease when I installed it. So it was back on with a new OEM bolt torqued correctly. :thumbup:

I also fitted Honda exhaust gaskets (the original right one was deteriorating) and a new expansion tank.

 

[Firefly]

Mine has now done about 12,000km with the 30T sprocket. I'll be taking it on a 10,000km tour with my sons next month. So to satisfy the nagging concern about the durability of the aluminium sprocket I removed it for a look-see today. The retaining bolt was tight and there was no wear on the splines. I had applied moly grease when I installed it. So it was back on with a new OEM bolt torqued correctly. :thumbup:

I also fitted Honda exhaust gaskets (the original right one was deteriorating) and a new expansion tank.

I'd take your OEM sprocket on your trip just to be on the safe side. I know Doc burns through them -- but the Mels unit didn't last him long at all if memory serves....

 

[Freddy]

Yes, I must confess that the same thought had crossed my mind FF. However, I'm still of the view that the lack of proper torque on the retaining bolt is the culprit for these pulley failures - except in Doc's case cos he's special.

I'll give another update in due course.

 

[Spider Rider]

30 tooth sprokett

I went through 3 sproketts from mells and striped the centers out of each in less than 1000 miles each. I have had one made out of stanless and he has plans for a 31 tooth they cost around 600 but worth the price as Ihave 7000 miles with no trouble (LFWMFG.com) 209 465 0444 in Stockton Calif. talk to Leo tell him Jerry sent you.

 

[docdoru]

I went through 3 sproketts from mells and striped the centers out of each in less than 1000 miles each. I have had one made out of stanless and he has plans for a 31 tooth they cost around 600 but worth the price as Ihave 7000 miles with no trouble (LFWMFG.com) 209 465 0444 in Stockton Calif. talk to Leo tell him Jerry sent you.

Thanks for the info :thumbup:

 

[Freddy]

I went through 3 sproketts from mells and striped the centers out of each in less than 1000 miles each. I have had one made out of stanless and he has plans for a 31 tooth they cost around 600 but worth the price as Ihave 7000 miles with no trouble (LFWMFG.com) 209 465 0444 in Stockton Calif. talk to Leo tell him Jerry sent you.

What am I doing that your not - or vice a versa?
If the bolt is tight there should be no movement in the spline as it clamps the face of the sprochet to the mating face of the shaft

I can't see 31T being an overall benefit, apart from SS. The 30T sprocket is high enough ratio when starting up hill loaded. 31T and you'd be slipping the clutch far more than I'd be comfortable with. It's 'bad' enough with 2 extra teeth.

 

[docdoru]

I Have my 30 T Sprocket 5000 km its still ok.

For the Original Motor 29 T Sprocket are the right one.

If you have Tuned the Engine 30 T Sprocket will be the right one.

What type of engine tunning? opcorn:

 

[Spider Rider]

31 tooth sprokett

For every tooth you add your rpm drops 200 rpm. milage is about 32mph

 

[woodchuck]

30 tooth sprocket

I went through 3 sproketts from mells and striped the centers out of each in less than 1000 miles each. I have had one made out of stanless and he has plans for a 31 tooth they cost around 600 but worth the price as Ihave 7000 miles with no trouble (LFWMFG.com) 209 465 0444 in Stockton Calif. talk to Leo tell him Jerry sent you.

I put on the 30 tooth sprocket 3000 miles ago and it is still like new. A lot has to do with your right wrist.
I don't baby it and I don't over work it. If the retaining bolt is tight, there is no reason to worry.

 

[WackyDan]

If they make one that can hold up, I'd get one. I guess I'll wait and see.

 

[Freddy]

I could be wrong but I don't think they are available any longer?

 

[Freddy]

Update

After recently completing the 12,500km / 4 week tour with my sons a week ago, I had a chance today to inspect that pulley. The pics below show that the teeth are about 80% worn away, ruining the belt. So it's back on with the OEM pulley and new belt. What was saved in fuel economy was doubly lost in returning to standard. On a brighter note, you will see that the internal spline of the aluminium pulley is as new, as is the shaft - despite concerns expressed above. I believe that the extra torque (110ftlb) I applied to it ensured its reliability. The conclusion I draw is that the pulley retaining bolt should be higher than recommended (sorry Scotty but the engineering can be 'managed' to ensure reliability of the spline at least)

 

[AMTJIM]

Owww, too bad. Maybe a steel upgrade will be introduced.

 

[challman]

My concern about the aluminum sprocket is even though it's hard anodized that's still only a surface coating. There have been a few stock steel sprockets that have worn the splines out so I don't see this one lasting too long. Time will tell I guess.

Yes but at least the shaft wouldn't wear out. That is a Huge and expensive job to replace

 

[Freddy]

Yes but at least the shaft wouldn't wear out. That is a Huge and expensive job to replace

Torque to 110ftlb and no more spline issues -even on alu pulley. It is the inadequate clamping of the pulley to shaft, as stated in BRP bulletin, that is the problem - not what they're made of.

 

[SPY]

maybe this will help, german quality, better then stock, 327,- $ export price ...

http://www.batquad.de/shop/ATV-QUAD-SPYDER-PARTS/CAN-AM-SPYDER/

Wilfried