Leaderboard

he said tarmac riding. if that meens track racing then i wouldnt bother with a fan either. if its city driving then for sure a fan and even some ducting around it, if possible

Buy a Clymer manual. Their procedure works every time.

Ehhh, well I personally would get myself a good quality compression tester and test it. I'm not a huge fan of shoving new piston and rings in what could very well be a very tired bore. If you have any other mods and any other things you've recently done to it I would list these off as well so that these guys can better help you. Many knowledgeable people around here, much more so than I.

I get stuff from Lew and I've found its best to leave a voice mail and wait a couple days. So if the language isn't a barrier, I'd give it a go even though it'll be an expensive call. However, I'd urge you to consider looking in to the CP Industries stuff. The Twister stuff is nice, but it can be a dance getting parts and I honestly don't see the company being around to much longer. Lew is getting old, and it seems Jr. is looking at other avenues. So parts would be even harder to get. As far as the CP Industries stuff, it's been proven, and just about any combo from trail to drag in every stroke and bore combo you could dream of. Not to mention how many dealers they have that are willing to return your calls and ship over seas ASAP. As far as comparing the two, there are several obvious differences, but in the end it boils down to cost vs performance. Not to mention headache. The CP stuff typically makes better numbers per cc out of the box, and once ported they really shine. The Twister stuff can run hard and there are a few out there, but they are high dollar motors done by very capable hands. Definitely not the norm.

http://www.shiny-red.net/guides/how-to-jet-your-carb/ I found the info below in the link above. Rich Jetting Symptoms and Solutions Motor won’t idle and idle set screw is ineffective. Try leaning out the air screw by turning it counter-clockwise a quarter turn at a time. If the air screw has no effect, install a leaner pilot jet and return the air screw to 1 turn out. Proper air screw settings are usually between 1 and 2 1/2 turns out. The correct pilot for your motor is one that allows instant off-idle throttle response, and allows the air screw to be effective between 1 and 2.5 turns out. If the problem still exists, check and clean the choke circuit and carb vent lines. Here's more info. http://www.shiny-red.net/guides/keihin-carburetor-jetting/