22 hours ago22 hr Hi all can any one shed light on this, my 08 rev 3 250. Previous owner had it set up like thusIgnition timing was fairly retarded by 5 degrees I'd guessNeedle jet is a JJJ not the JJH standard size.Front sprocket is a 10 tooth Found the time due to the bottom end going and having a rebuild.I can only guess they wanted a very soft engine.On second note my m8 has a 2001 modle which seems to have more grunt and power than mine on a speed test he pulls way and leaves a fair gap even if we get away the same time ect.
1 hour ago1 hr A 10 tooth sprocket does several things. It primarily helps those of us who are less skilled with the clutch. You can go slower with the clutch out so it requires less clutch work. If you do a series of very close obstacles requiring a burst of throttle, it is easier to keep your speed down. (think - log, log, log) If the throttle does get away from you, the bike runs out of rpm sooner so is less likely to squirt out from under you. A 9 is even better for these things but made it harder to get over larger obstacles so not desirable. It felt like it took away the bikes reach.
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