I have a 1996 XCR 600 SP and I’ve done everything that I know to get rid of that one second bog at the beginning of acceleration. I have rejetted, put in Q-8’s (needle jets) and changed needles – installed the almond spring in the drive clutch and #10’s for weights, changed the helix and secondary spring, and replaced the 21 tooth gear with a 19. I live in ND and have been running 330, 350, 350 for jets. Can you recommend something that I may have forgot?
Bummed out Bill
Despite our best efforts, about all you can do is clutch around that bog at 5000-5500 rpm. It seems as if it’s always going to be there. Some of the almond springs are pretty soft (down around 260 pounds which causes the engagement to come in soft at around 4600 rpm) so you could try another almond spring to get the engagement up above 5000 rpm (we liked 5200). Many sleds responded to installing 3.0 carb slides. I would be very curious to see what the ’98 carb specs are for the XCR 600 as the ones we’ve tested seemed to have that bog eliminated.