ihaterocks Posted May 30, 2013 Report Share Posted May 30, 2013 I have a 1995 GAS GAS JT160 and lately I have been hitting the top of the power band in the lower gears while riding in sections. I feel slower then most bikes even the newer 125's. Theres also this what I like to call no go period where the power doesn't kick in for almost a half turn of the throttle. It was never ridden in competetion by its first owner. My boyfriend rides in the Advanced class and he even says it seems unusually slow. It has a 10 tooth sproket in the front and I was thinking about changing it to an 11 tooth. Should I even mess with the gearing? Quote Link to comment Share on other sites More sharing options...
lineaway Posted May 30, 2013 Report Share Posted May 30, 2013 Leave it alone. And yes the newer 125`s are faster! Quote Link to comment Share on other sites More sharing options...
thats_a_five Posted May 30, 2013 Report Share Posted May 30, 2013 You say "where the power doesn't kick in for almost a half turn of the throttle." Check the free play in the cable. If the cable has too much slack, the carburetor will not open when it should. This will also result in the engine not being able to rev up as high as it should. Net result not much power. My '94 JT25 (250) has a 10 tooth front and it also revs out so I ride many sections in second. Of course, the 250 has more torque than your bike. Quote Link to comment Share on other sites More sharing options...
lineaway Posted May 30, 2013 Report Share Posted May 30, 2013 You could have other issues with the bike. Plugged exhaust and/or spark arrestor. The 160 was pretty much a dog. Have Stan Hensley have a look. Quote Link to comment Share on other sites More sharing options...
blade7 Posted May 30, 2013 Report Share Posted May 30, 2013 could it be a carb set up issue as would have though smooth power through the rev range might be littel rich bogging the bike down ? Quote Link to comment Share on other sites More sharing options...
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