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Search results

  1. cornishgs

    Found source for discontinued 77-79 front caliper pistons

    for my gs550 I had early calipers with 38 x 32mm pistons couldn't find any so have used some pattern ones 35mm x 38mm from Honda cb900 no fitting problems also suzuki gt250 and gt 550 list caliper pistons as 38mm x 35 so lots around on ebay also stainless ones .
  2. cornishgs

    rebuilt engine low compression top speed!! worn cam

    Having fitted replacement cam,one size up main jets 82.5's,a nd a new coil took it out today and hesitation and lack of power has now gone pulls strongly and quickly up to 95mph and would have gone faster if I had wanted too.(chickened out!!--- after 30 years not riding a bike 90 seems plenty...
  3. cornishgs

    rebuilt engine low compression top speed!! worn cam

    motad is new stainless 2months old, tried a ride with fuel cap loose no difference ,inlet rubbers are like new,sprayed carb cleaner around to check for leaks before .so where I,m at at moment checked cam timing spot on put better a better used inlet cam in like new valve clearances checked...
  4. cornishgs

    rebuilt engine low compression top speed!! worn cam

    H fellow Brit, have gone through carbs earlier in year.all look good, they don't have diaphams luckily as they are vm slide carbs pre 1980 carb manifold intakes with new o rings are like new.air filter new .air box all good. I will get there in the end just need to check through everything...
  5. cornishgs

    rebuilt engine low compression top speed!! worn cam

    I have rechecked cam timing its spot on at tdc arrows line up with rivet pins 20 links etc. whilst there I will replace worn intake cam 2 lobes worn below spec and reshim after if needed. I have taken carbs off to get at tensioner so I will take carb bowls off and fit 82.5 main jets, 80 fitted...
  6. cornishgs

    rebuilt engine low compression top speed!! worn cam

    yes carbs have all been totally stripped new orings etc sonic cleaned etc
  7. cornishgs

    rebuilt engine low compression top speed!! worn cam

    so maybe spark related , was worried compression and hadn't thought it might be sparks
  8. cornishgs

    rebuilt engine low compression top speed!! worn cam

    Thanks for suggestions it gets to about 7000 8000 rpm in 5th and 6th and just runs out of power ,wont have chance until this weekend to check. will double check cam timing again. and ignition timing first. If cam timing is not out, I will pop in cam as well to rule cam valve lift out. its...
  9. cornishgs

    rebuilt engine low compression top speed!! worn cam

    Any Ideas for my compression figures for my 79 gs550 will get to 70 quite quick but just runs ou of steam at 80mph??? comp hot 135 130 135 135 comp cold 125 120 125 125 wet test cold 150 145 150 150 checked with throttle wide open good battery have fitted o/s pistons, new rings...
  10. cornishgs

    78 gs550 transmission access, splitting cases apart leaving top end intact

    cheers for quick reply will hopefully fit kickstarter when ive got some spare time :welcoming:.over Christmas .this forum has helped me so much with sorting my bike.its just great to ride it at moment.
  11. cornishgs

    78 gs550 transmission access, splitting cases apart leaving top end intact

    Hi ,does any body know is it possible to split cases apart on 79 gs550 without taking head and cylinders, ,reason being have rebuilt motor recently.but wanted to retro fit kickstarter, I like the original look.and it might come in handy some time. previous owner had chucked kickstarter gears...
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