19 tooth countershaft sprocket

[Frulk_imp]

PT. What's your tach saying now for RPM's at 70mph?

[physics-teacher_imp]

Looks like 3700-3800.

[Ron in MO_imp]

Thanks for the feedback! Looks like this conversation has another satisfied customer.

[IndianRider_imp]

Just an update from another thread , I did the 19 front and liked it ..wanted to test the 37 rear to even lower the revs at freeway speeds and ordered from PBI sprockets . The 37T aluminum rear part number is as below


Items
Qty Item # Description Price Each Total
1 3071- 3071- CBR-600F2/F3, CB-900F, CBR-900RR, VTR-1000F, CB-1100.
Aluminum Rear Spkt. Teeth:Aluminum 37
$60.35 $60.3

[marel_imp]

I'm finding a lot of older references to vendors for 19 tooth sprockets but I'm having trouble finding one that is currently producing. They all want you to go down some teeth for crotch rocket acceleration. Any ideas, please?

Many of us 2013 CB1100 owners have converted their front sprocket to a 19T cog and love the results. Here is a link to the company I purchased mine from:

http://www.shop.pbisprockets.com/product...oductId=66

PBI Sprockets are quality units and are reasonably priced.

Many of us 2013 CB1100 owners have converted their front sprocket to a 19T cog and love the results. Here is a link to the company I purchased mine from:

http://www.shop.pbisprockets.com/product...oductId=66

PBI Sprockets are quality units and are reasonably priced.
The DYI additional information - I had some problems to buy 19 tooth sprocket in EU, so decided to buy the OEM one, and the 19 from Triumph Tiger. My friend has cut both of them on the lathe and then welded all together.

[Cormanus]

Welcome to the forum Marel, although I see you've been lurking for a while.

[GoldOxide_imp]

Hey marel - welcome to the land of the living.

That is definitely one way to get your 19 teeth - indeed.

[marel_imp]

Hey marel - welcome to the land of the living.

That is definitely one way to get your 19 teeth - indeed.

I do not have much time to read all topics which might be found here, but I'm still happy to have SC65'13, which I bought few years ago in a mint condition, with only 1.700km on the odometer and use this bike as a third bike in family - when is warm and dry outside

That's the short story, I hope not so bored...

Hey marel - welcome to the land of the living.

That is definitely one way to get your 19 teeth - indeed.

You are absolutely right - this way is fast and pretty cheap, but anyone who is going to do this, should find a professional workshop to prepare this sprocket mod.

[jtopiso_imp]

nice welding and turning to make that work well.

Indeed. You need a tight fit to keep concentricity right and to keep the pinion plane perpendicular to its axis. Any miss alignment will create vibrations and increase fatigue loads.

Also, I'd be a bit concern about the heat-affected area by the weld. It seems far enough from the hardened surface (pinion faces and spline), but perhaps some stress-relieving wouldn't be a bad idea to avoid a fatigue failure.

[marel_imp]

nice welding and turning to make that work well.

Indeed. You need a tight fit to keep concentricity right and to keep the pinion plane perpendicular to its axis. Any miss alignment will create vibrations and increase fatigue loads.

Also, I'd be a bit concern about the heat-affected area by the weld. It seems far enough from the hardened surface (pinion faces and spline), but perhaps some stress-relieving wouldn't be a bad idea to avoid a fatigue failure.

Indeed. You need a tight fit to keep concentricity right and to keep the pinion plane perpendicular to its axis. Any miss alignment will create vibrations and increase fatigue loads.

Also, I'd be a bit concern about the heat-affected area by the weld. It seems far enough from the hardened surface (pinion faces and spline), but perhaps some stress-relieving wouldn't be a bad idea to avoid a fatigue failure.
This "invention" was already balanced and seems to be more/less ok - it has a small run-out.
Both sprockets come from the same manufacturer and have the same thickness (and metal alloy?). The inner sprocket was dedicated to SC65, so really I hope will work as should be...