Installing an F3 89 tooth rear sprocket on my ST - does it work??

[jcthorne]

I would think the larger diameter F3 sprocket would make access to the air valve easier than on an RT, not harder. I see no need to relocate the air valve for this swap.

 

[r1100rider]

Where did you get your 30T and what spyder model is it on?

Bob

The German one you found is it I have a 2009 rs sm I think the the output shaft spline is the same for an rt as long as it is a v twin but check,again sm only due to nanny it lowers rpm in 5th about 500 rpm ,the 1330 guys got what we all wanted a 6 speed I don't understand wanting to lower the finial drive if you need more two up pulling a trailer drop a gear on the grades , wouldn't it be easier to just put a lower profile rear tire on and bringing that sprocket closer to the road will make the stone in the belt problem worse just look sometime when you pull off the pavement into some soft gravel your belt is almost running in the gravel as you power away

 

[finless]

The German one you found is it I have a 2009 rs sm I think the the output shaft spline is the same for an rt as long as it is a v twin but check,again sm only due to nanny it lowers rpm in 5th about 500 rpm ,the 1330 guys got what we all wanted a 6 speed I don't understand wanting to lower the finial drive if you need more two up pulling a trailer drop a gear on the grades , wouldn't it be easier to just put a lower profile rear tire on and bringing that sprocket closer to the road will make the stone in the belt problem worse just look sometime when you pull off the pavement into some soft gravel your belt is almost running in the gravel as you power away

Thanks. I would go for it but the concern I have is what Billy said.

That is the old style sprocket. Only 1 flange and no way to bolt on the damper/flywheel, what ever that thing is. That sproket should bolt on and work.

My front sprocket is the new style and based on reading about it here in very old posts, you want to have the damper and extra flange or you may have problems with shaft spline wear on a RT due to the starting out load. So I think I will pass and live with the higher RPMs unless someone decides to make one with the damper which I doubt will happen.

Billy, sorry to lead your thread astray on this. It just happened I was investigating this when you brought it up.

Bob

 

[billybovine]

I would think the larger diameter F3 sprocket would make access to the air valve easier than on an RT, not harder. I see no need to relocate the air valve for this swap.

If you put a 6 spoke sprocket on a 3 spoke rim. When indexed correctly, 1 of the spokes is going to end up right in front of the valve stem. But since there are 5 possible ways to index the sprocket to the rim. At least one of the positions should give access to the valve. Just may look goofy.

 

[billybovine]

Billy, sorry to lead your thread astray on this. It just happened I was investigating this when you brought it up.

Bob

It was kinda related so no problem. It's not like you started a conversation about your dog. :joke:

 

[PW2013STL]

It was kinda related so no problem. It's not like you started a conversation about your dog. :joke:

Speaking of dogs I once owned a Golden retriever ---------:roflblack:

Since both the 2014/15 RT's and the new F3 have the same motor and if the sprocket to sprocket distance is the same the belt and sprocket from an F3 should fit.
Lamont has an F3 so you should PM him and ask for that measurement.

 

[Lamonster]

The F3 rear wheel is a one piece wheel with no replaceable hub like on all other Spyders. Not sure if they mate the same or not, they look like they do.
As far as changing out the sprocket to your ST I'm told by the head BRP tech that this will not work, it would throw a code because the calibration for the VSS would be off.

 

[Bob Denman]

I guess that it'd be nice to know exactly what systems are being monitored...
If running more rpm than the speedometer thinks is normal; the VSS must also be checking what gear you're in, and comparing the rpm levels to those known readings. :shocked:
Or... is the BRP tech just trying to discourage some "creative thinking"?

 

[billybovine]

Speaking of dogs I once owned a Golden retriever ---------:roflblack:

Since both the 2014/15 RT's and the new F3 have the same motor and if the sprocket to sprocket distance is the same the belt and sprocket from an F3 should fit.
Lamont has an F3 so you should PM him and ask for that measurement.

I see no reason that the sprocket and belt from the F3 NA will not physically fit on a 2014/15 RT. Since the F3 international version uses the same belt and sprocket as the 2014/15 RT. In fact some of 2015 RTs have the same 6 spoke rim as the F3.

 

[Bob Denman]

So if the "Euro-F3" shares parts with the RT; has the VSS been given different coding for the gear-change? :dontknow:

 

[billybovine]

The F3 rear wheel is a one piece wheel with no replaceable hub like on all other Spyders. Not sure if they mate the same or not, they look like they do.
As far as changing out the sprocket to your ST I'm told by the head BRP tech that this will not work, it would throw a code because the calibration for the VSS would be off.

I had not noticed that the new 6 spoke rim, standard equipment on some of the 2015 F3, RT and ST, did not have a replaceable hub. But since the new rim fits across 3 different models lines I think that proves the 2 sprockets are interchangeable.

Yes it could throw a code. Since the wheel speed sensors will not be affected I did not think it would be through the VSS system. I figured the code would come from a rpm to speed mismatch. That would be in place to detect an excessively slipping clutch.

I would still like to know the difference between the belts from a 998 model and a 1330 model.

 

[billybovine]

So if the "Euro-F3" shares parts with the RT; has the VSS been given different coding for the gear-change? :dontknow:

That's possible. Another possibility is the 1330 models do not check for clutch slippage. Or the parameters are so wide, both options will work.

 

[gmctech]

The F3 rear wheel is a one piece wheel with no replaceable hub like on all other Spyders. Not sure if they mate the same or not, they look like they do.
As far as changing out the sprocket to your ST I'm told by the head BRP tech that this will not work, it would throw a code because the calibration for the VSS would be off.

I don't own any BRP products, but I have had my friends apart too many times.

we're about to order parts an begin this upgrade..

Has anyone out there actually done this?

 

[larryd]

I don't own any BRP products, but I have had my friends apart too many times.

we're about to order parts an begin this upgrade..

Has anyone out there actually done this?

I'm larryd and I too would like to do this to my 2014 RTS...PLEASE PM me when you have it on the road...THANK YOU, larryd

 

[Bob Denman]

From what Steve at BRPcare has reported; you'll now be able to swap sprockets and belts. You just need a hookup to BUDS, to choose which setup you're running.

Billy,
Back to your original post: I think that you might need to change the front sprocket also... ( I don't know if this has been addressed...)

 

[billybovine]

From what Steve at BRPcare has reported; you'll now be able to swap sprockets and belts. You just need a hookup to BUDS, to choose which setup you're running.

Billy,
Back to your original post: I think that you might need to change the front sprocket also... ( I don't know if this has been addressed...)

Why?

 

[Bob Denman]

When they went to the 1330 engine (in 2014); didn't they change the belt construction and/or configuration a little bit? :dontknow:
I suspect that his would have been carried over to the F3 belts also...
I'm just saying that you might want to check this out a bit.

 

[billybovine]

When they went to the 1330 engine (in 2014); didn't they change the belt construction and/or configuration a little bit? :dontknow:
I suspect that his would have been carried over to the F3 belts also...
I'm just saying that you might want to check this out a bit.

The 1330 engine has the same front sprocket as the 998 engine. So no need to change front sprocket. In fact there is no other front sprocket to go to unless you have something custom made.

 

[Bob Denman]

I'm glad that I'm wrong about this one! :thumbup:
Wasn't there a change to the belts, when the 1330s appeared?

If that's the case, and the newer belts can use the older sprockets: :yes::yes::yes:

 

[larryd]

I don't own any BRP products, but I have had my friends apart too many times.

we're about to order parts an begin this upgrade..

Has anyone out there actually done this?

Any updated progress on this project??? larryd