Recent content by umacs4

Syncing the carbs the vacuum on 1 thru 3 on the dial was 30 on #4 it was 0..no movement. tried to adjust the jet in (all the way) or out and it didnt change nothing on the running bike.we had the idle speed set high then we were checking rpm around the plug wires with some sort of gauge that...

Well guys its been awhile .I talked to the tech and #4 compression checked 128, 1-3 148. cant get a vacuum in #4 but the others are synced. checked timing and it seems to be good.with the engine running and pull plug wires on 2&3 and it continues to run but pull either #1 or#4 and the engine...

Thanks guys i'll check with the tech to see what the compression has been. I know he has done that and a leak down test and it never repeats the same numbers or results. One time holds the next time it doesn't. On the compression two cylinders are the same and the same with the other two but 10...

Hello everyone. I have bought an 1981 CB750c four custom Honda and have had the carbs gone through with kit for the bottom side (jets,orings etc) then turned around and replace air chut off valves and throttle tube orings on the set. Replaced the boots on both sides and I still cant get a vacuum...