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hot pipes

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Sandcast 2356:
I have got my bike up n going, and I noticed that when run at higher rpms all 4 pipes are the same temp. However, if I just put around in-town (30-35 mph) #1 and 3 pipes are the same temp. But, #2 is freakin burning, and #4 is almost cold. (#1 being on the far left if sitting on bike). All 4 cylinders are firing, but it does backfire occasionally out of the right pipe only when run at these low speeds in around 2nd or 3rd gear. I'm assuming it's in the carbs, but I have them all adjusted as balanced as possible without any equipment (college student). Only other thing I can think of is the points. Being #2 and #4 are on the same point, and that point I found to be bent to constant contact and bent it back to a running state. I have ordered new points (being the old ones are barely doing the job) and was wondering if that might fix the problem. Any input would be helpful as this is my first bike.

Also, I was wondering if the frame has a certain level it has to run at in order to keep the engine cool. The #$%@&* that had it before I did put longer forks on it and didn't bother changing the fork angle. I have adjusted them a little lower being it was rediculous to drive before but it is still a littl high in front. (bout 1" to 1-1/2" difference from tail to engine.

Bob Wessner:
Well, I knew the redline value on the '69 which is why I replied, but in rereading the rest of your post, have you checked for manifold leaks on the cyclinder that gets hot at low RPM's? Maybe at higher RPM's you are still able to draw enough fuel volume to offset the leak somewhat, but not at lower RPM's. The number #4 sounds like maybe a plugged or partially plugged idle circuit?? Just a couple of thoughts from an inexperienced wrench.

Sandcast 2356:
the heads on 1 and 2 are loose from the other guy, but I thought I had um seated pretty good, I'll run through a check. Thanks for the advice.

Dennis:
2 & 4 DO NOT run on the same point set.
1&4 are together and 2&3.
also check spark plug caps

Sandcast 2356:
huh, you learn something new everyday, and did you mean gaps??

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