Andrews y grind cams and drag pipes

[hubbard]

I'm sure theres a thread for this please direct me to it, thanks

[bobrk1]

what do you want to know? I'll guess maybe and idle problem? drill a hole on the back of pipe and put in a 3/8 bolt for some back pressure hope this helps.

[Lew]

Lose the drag pipes, unless you're drag racing.  Number one worst thing you can do on a street motor.  You will never get the carb to function correctly at anything under max RPM. A street motor needs back pressure to run correctly through the power band.  Adding some restriction can help, but just moves the problem into a different spot in the power band.  The pipes need some form of expansion chamber (muffler) to restore lower RPM torque and get the carb to work properly..especially when running the long duration Y cams on the street.

[Hillside Motorcycle]

Install a 1 1/2" long, 1/4" bolt, and stack 3-4, 5/16" nuts on it.
That'll grab 10-12 ft/lbs off the bottom,(and perhaps more) generate more peak torque, and once the reversion is somewhat under control, then dial the carb in.
Scott

[hubbard]

I've got a customer that refuses to accept the drag pipe thing because he had a 64 xl in 64 that ran great. He sez it would do 120 easy. I'm just trying to get some other opinions and input to pass on. Thanks for the replies

[Hillside Motorcycle]

Doubt is 120 was that easy, with that 900..........
Scott

[Winston Wolf]

Things always get faster as time goes by.... I can say it would take more balls then brains to go 120 on my ironhead, if you could stand the vibration.  The bolt thing does work, give it a shot.