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So is the Bros 400 the close ratio tranny? Is that a bolt in mod?
BIKES: Honda: RC31 Racebike/ NT650 Streetbike, DUCATI: None at the moment. Former MSF Rider Coach / Trackday Instructor/ Expert Roadracer #116
"I'd rather ride a slow bike fast than a fast bike slow."
Actually what TBR did was buy a bunch of Bros400 3-4-5 gearsets and re-package them. It is a "bolt-in" mod relatively but what happens, it lowers the 3-4-5 ratios. Sooo... ya gotta fit a 17 T front sprocket and go smaller on the rear to get the same top speed. That's where the fun starts. The 17T sprocket will only fit if you grind clearance into the shift shaft. With smaller rear sprockets the chain eats into the swingarm slider more- especially if you are running a flipped eccentric. So then ya gotta make a custom chain slider. Fun stuff.
I have a CR trans in my bike. It's nice but not totally necessary.
J.D. Hord
Keeper of Engine Nomenclature, 9th Order
Actually what TBR did was buy a bunch of Bros400 3-4-5 gearsets and re-package them. It is a "bolt-in" mod relatively but what happens, it lowers the 3-4-5 ratios. Sooo... ya gotta fit a 17 T front sprocket and go smaller on the rear to get the same top speed. That's where the fun starts. The 17T sprocket will only fit if you grind clearance into the shift shaft. With smaller rear sprockets the chain eats into the swingarm slider more- especially if you are running a flipped eccentric. So then ya gotta make a custom chain slider. Fun stuff.
I have a CR trans in my bike. It's nice but not totally necessary.
That is the answer I wanted. All hail his Hordliness.
BIKES: Honda: RC31 Racebike/ NT650 Streetbike, DUCATI: None at the moment. Former MSF Rider Coach / Trackday Instructor/ Expert Roadracer #116
"I'd rather ride a slow bike fast than a fast bike slow."
Smaller drops in revs between gears. If I remember correctly stock 5th has an overdrive ratio. Great for cruising, not so great for accelerating. Stock Hawks have so much torque that the stock ratios are fine. My RGV250 is another story altogether.
Garth H
San Jose, CA, USA
'91 Hawk w/700cc Kit and Africa Twin Cams
again, I say..I have the 525 chain 17 tooth sprocket and it fit right in..no grinding or anything..Is my output shaft- shifter shaft different or what??
If mice were men and men were mice, once upon a time, Men were mice and mice were men, twice upon a time.
again, I say..I have the 525 chain 17 tooth sprocket and it fit right in..no grinding or anything..Is my output shaft- shifter shaft different or what??
Sorry to bump this old thread, but I've searched and couldn't find the answer. Where did you get your 525 17T sprocket that didn't require notching the shift shaft or grinding the teeth? I'd like to try a 17T next time around.
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