smaller or large size jet

[christengai]

Here's a weird one, the rev counter on my 1988 Tengai keeps jumping up to the red line and back down again totally randomly! it does not matter if the engine is just idling at 12 hundred revs the needle keeps flicking up and down. Any ideas? thanks Chris

[Jeff Saline]

On Sat, 21 Feb 2009 18:01:01 -0600 "fmhilton" writes:

> If you modify the exhaust to a more open flow muffler do you go to a > larger or smaller size main jet? I have an 08 that has a modified > OEM exhaust that if more open, I went from the stock 145 to a 148 > main jet, Did I go the right direction? > Mike H.

<><><><><><><><><><><> <><><><><><><><><><><> Mike, At wide open throttle what happens when you close the throttle just a little bit. Does the engine pick up rpms, hesitate or no change for a bit? Usually when you play with jetting on a CV carb you should start at the main jet at wide open throttle. Then mess with the needle jet at mid range and finally the pilot jet for idle and just off idle. Best, Jeff Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT . ____________________________________________________________ Digital Photography - Click Now. http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTDvmP0N8UtPtiQymU1E9XAukJQlfN7siuLaTstdrC1Y4WlAdFcKKc/