help with carbs

[banshee(911)]

ok well i have a cheetah cub set up 68 mm with a d&d cool head with 18cc domes i have v force reeds with a vitos 4 mill stroker short rod crank im running toomy t5's that have been modded by modded i mean my builder changed the the pipe going to the silencer made it bigger wiseco prolights with a 5 degree advanced timing lightend fly wheel ok well im running 150 mains and it runs strong tillup to 7/8 throttle then boggs looking to fix the prob. i c that every one is running bigger mains like 160's or 165's should i get new carbs or new pipes like shearers or cpis my builder told me to get some lectrons need help thanx and im running 34 mm pj's

Edited April 29, 2008 by banshee(911)

[IrideA250R]

get new pipes. While it sometimes works, I never like running modified pipes like that. CPI's or Shearers should suit you much better.

[dajogejr]

From my own experience...here's the problems I ran into on my initial 4 mil cub with stock carbs and T5 pipes.

 

Base gasket was leaking, deck of the cylinder had a slight dip in it (leaking water/coolant) and my flywheel was starting to break up inside.

 

Look at your plugs. If they chop out ok, start looking electrical.

 

While I agree...a better pipe like CPI or Shearer is a better choice, it should rev out clean even with those pipes. It won't make as much power that high up in the RPMs like they will, but...if jetted correctly, it will rev out clean.

[dajogejr]

Here is a dyno run of mine. The broken up line was the pull with the coolant leaking and the flywheel magnets busted up. The 84.8 pull is once both of those were fixed....

You can see how it's all broken up with bad parts.

 

[banshee(911)]

From my own experience...here's the problems I ran into on my initial 4 mil cub with stock carbs and T5 pipes.

 

Base gasket was leaking, deck of the cylinder had a slight dip in it (leaking water/coolant) and my flywheel was starting to break up inside.

 

Look at your plugs. If they chop out ok, start looking electrical.

 

While I agree...a better pipe like CPI or Shearer is a better choice, it should rev out clean even with those pipes. It won't make as much power that high up in the RPMs like they will, but...if jetted correctly, it will rev out clean.

thanx dave

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