trailmaster Posted August 28, 2007 Report Posted August 28, 2007 I just got a 2000 Banshee the other day, engine is mostly stock with stock pipes except for a booster bottle. I was told the engine was rebuilt a little over a year ago and is still on the standard bore. Since it was last rebuilt, he claimed it only had no more than 40-50 hours on the top end. I did a cold compression test just about 5 minutes ago with a WOT and about 20 kicks... I was only getting a compression reading in both cylinders between 105 and 110. I pulled 1 spark plug at a time and thats my reading. I'm a little concerned about that number being a little low. I'm guessing stock is about 125-130psi? It runs very well and starts first kick everytime. However, I have not really had a chance to ride it at all since I'm redoing bushings and bearings throughout, changing oil, etc. But it definely starts and runs great. Should I be concerned about the compression at this point? There is an upcoming ride in 2 weeks that I have been planning on going to for the whole weekend. Probably ride between 10-14 hours. Think I will be good as far as compression? Quote
bansheefreak Posted August 28, 2007 Report Posted August 28, 2007 (edited) start it up and run it some get motor hot then check it .. also changing your oil in a banshee is only changing the trans oil.. but sure you knew that.. Edited August 28, 2007 by bansheefreak Quote
trailmaster Posted August 28, 2007 Author Report Posted August 28, 2007 Yeah, I was going to run it and then do a compression test but it was getting late. Yes, just changing the gearcase oil. Is it normal to have a grey looking gearcase oil? Doesn't look like water has been in there but just wondering. Quote
shee4speed Posted August 28, 2007 Report Posted August 28, 2007 Whats your elevation?Gray oil is just used.Prob.just change it. Quote
Snopczynski Posted August 28, 2007 Report Posted August 28, 2007 pull both plugs, and test after its been warmed up. per every 1000 feet of elevation you can lose up to 5-10 psi. Quote
trailmaster Posted August 28, 2007 Author Report Posted August 28, 2007 (edited) When you say remove both plugs, what do you mean by that.. as far as when doing a compression test? Dont you need to have one of the plugs in while you do a compression test? Elevation where I live is around 1300+ ft just outside of Pittsburgh, PA.. actually maybe alittle higher around 1400-1450. So do you think this may effect the compression and explain why its a bit low? Edited August 28, 2007 by trailmaster Quote
shee4speed Posted August 28, 2007 Report Posted August 28, 2007 Yank out both plugs and do the test.Kick that S.O.B.till the gauge stops moving.115 is good compression for ya I believe.As long it is very close in both cylinders. Quote
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