I'm guessing someone here can help me out. I have a customers bike in my shop. It's a 66 305 CA77. I've been working on it for a few months rewiring, powder coating, changing out the broken bits etc. The stock mufflers were rusted out. I made some adapters and added some Harley screaming eagles mufflers on there and it looks pretty good actually. My concern is that I'm not getting enough backpressure now. The bike, when I can get it to start, has a small hunting idle. I try and give it any throttle and it dies. I give it the smallest amount of choke and it revs extremely high. It doesn't really like 1st gear either. In second I can idle around the block at about 10-15 mph without touching the throttle. I get backfiring out of the left pipe but nothing from the right. Compression is 90 in the left and 150 in the right. Now I know the 90 is low but I've had bikes run on less without backfiring. The 90 is up from 30 after a ring job. Valve have been adjusted. The timing is on and I believe the points are gapped correctly. Seeing as I've never set points before, I say I think they are set correctly. I know this is a lot of info to read but I'm trying to give as much info as I can in order to get a pretty solid answer.
Also if there is anyone in the Chicago area (NW subs actually) that would want to come by and give me a hand I would very much appreciate it. I'm assuming this is a pretty friendly community. I don't want to just ask a question and leave, but the customers are about to pull the plug and cut their losses and this bike is just too cool looking to do that. So any help would be appreciated.
-Nate
How picky are the 305's about mufflers?Nate,
Gap the points to .014. Attach a static timing light to the wire that attaches to the points, Rotate the crank by the 14mm bolt that resides under the alt cover. The light should come on at the "F" mark. Rotate the points plate to make that happen. Remove the carb, and thoroughly clean all jets and passages. Pay extra attention to the pilot jet as it has a tiny orifice and plugs easily. It's going to struggle on the cylinder with only 90psi Davo For sure a very through carb cleaning. Mine seems to be very sensitive to float level. If the plugs are sooty try lowering the float level just a tiny bit. Carefully check the timing once the points are properly adjusted. A test light seems to be the best way. Mine is difficult to retard enough to be on the mark.
OK, carbs have been gone through again. Float height is dead on. Everything else was replaced with a rebuild so no clogged passages. Needles position is second from the bottom of the needle. Points are within gap range from what I can tell. Like I said, I've never set points. Plenty of valve adjustments so if it's anything like that, then points are gapped correctly. Now I can't even get it to start. I need to pull the plugs and check them to see if they are fouled but man, this bike is just getting to me.
Since I'm not doing a restore, I'm looking at these pipes as I think they will be much closer to stock backpressure. http://www.mikesxs.net/product/07-0060.html Anyone think yay or nay? Experiences? Seems like they would fit the bill for a relatively cheap investment.
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