I cant make up my mine about sprockets and chain pitch, 428 or 520 ?
The original is 520 pitch but seems quite a heavy chain and a bit over the top for a 250cc bike .
I understand the non o-ring on an MC21 as it has a cush drive... But on an MC28 which doesn't have a cush drive I'm wondering if having an o-ring chain helps with the harshness of the transmission?
You only realy need a non O ring on a track or race bike, when your'e looking for that last last ounce of BHP,on a road bike it dont make much difference. _________________ Proud Father of , 05 ktm 400exc supermoto 2018 honda crf rx supermoto
I was of the impression the O'ring is only for lubrication and longevity of the chain and did nothing for cushioning drive train lash from acceleration/gear changes etc.
greggo wrote:I was of the impression the O'ring is only for lubrication and longevity of the chain and did nothing for cushioning drive train lash from acceleration/gear changes etc.
That's correct, as you will see the rings are on the side of the chain.
You only realy need a non O ring on a track or race bike, when your'e looking for that last last ounce of BHP,on a road bike it dont make much difference.
Totally agree, and the other downside for the non o-ring is that it won't last as long as the o/x-ring chains.
Soooo,
Road bike = o/x-ring chain
Race bike = Non o/x-ring chain
Who remembers Rossi crouching down next to his Aprilia 250 putting the chain back on at the side of the track. I believe that was a #428.
The Stop & Go team used both #520 and #428 in their Moto2 campaign last year. It wasn't so much a quest for more power to the wheel, but more about fine tuning the gearing.
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