Motorcycle Forum banner

compression

  1. Confusing Spark Plug Threads

    Motorcycle Repair
    I recently purchased a 1977 Suzuki GS750 and I was testing the compression with good results (120psi) until I got to my third cylinder which, at it's very best, only got up to about 50psi. Fortunately (or unfortunately) I realized that there was air escaping from around the threads on my test...
  2. compression test

    Motorcycle Repair
    how do i do one? my bike still wont start and i need help still :mad::mad:
  3. fuel mixture - idle speed - choke - compression- question

    Motorcycle Repair
    Hi - I'm a new rider. i was given a 2007 virago 250 that sat cold untouched for 18 months with about a half to quarter tank of gas in it. I got it in the fall of 2011. Here's what I've had done so far - Tank cleaned by a radiator repair shop b/c of rust (didn't coat it) - fall 2011. Carbs...
  4. No Compression on Carborator

    Vintage Forum
    On my '73 Honda CB350g, the carborator on the right side has no compression. The left side has great compression. I have adjusted the valves to the correct tolarances. But still the bike is only running on the left cylinder. Any sugguestions would be helpful. Thanks.
  5. Exhaust questions 96 Honda magna 750

    Honda
    Would it be ok to run 2" pipes with no muffler or baffle or whatever? Just four empty 2" pipes. I do it on my carbureted cars all the time but I wasn't sure what the risk of doing this on my bike were. Compression etc... I'm only using this bike for to and from work and daily cruising. Not racing.
  6. Honda Cl 175 engine problems

    Vintage Forum
    I'm having trouble with compression. The right side is low (70) with 10 cranks compared to the left (105). I'm at 3000ft elev. The left side runs, the right side won't. Timings OK. Sparks OK. I've replace rings and had valves ground. New head gasket. When I put it together this last (THIRD)...
  7. '92 Virago Horrific Performance (Max Speed of 50 mph, No Guts)

    Yamaha
    I'm no mechanic, but two real ones haven't been able to figure out what's happening with my bike, so I'm trying to figure some things out on my own. Bike sat for a couple years, and I had carbs cleaned. Bike would backfire a lot, and the mechanic couldn't figure it out. I let the bike sit...
  8. CB350 compression

    Honda
    What should the compression be on a newly rebuilt CB350 engine that is not broken in yet with tri ground valves? The CLYMER manual and my source says the compression for the stock engine should rise to the peak in about 5 to six kicks with the first kick about half of the compression and each...
Top