tro Posted January 2, 2012 Report Share Posted January 2, 2012 hey ya'll. ill give you my specs first. 2002 banshee t5's boyeson pro series reeds jetted K&n chariot cool head 21cc 500ft elevation. +/- 100 i just got done putting my cool head on not too long ago with 21 cc domes. i did my compression test and in each cyclinder im right around 120 psi. on noss website it should be around 156. i did this test on a cold engine with throttle wot and kicked til the needle leveled out. my other problem is that i cant get it to run at all. kicked it a bunch of times, nothing. tried pop starting it and got it to run for a little bit but died moments later. both spark plugs have spark, its getting fuel. im just stuck right now and not sure what to do. take the head off and check the o-rings? any help appreciated. thanks. Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted January 2, 2012 Report Share Posted January 2, 2012 what was your compression before the coolhead and was it running before? Quote Link to comment Share on other sites More sharing options...
tro Posted January 2, 2012 Author Report Share Posted January 2, 2012 thats where i messed up. did not check compression til after because i went to get the gauge after i put the cool head on to check i had the right compression. but it ran its balls off before the cool head and only took a couple of kicks to get it to run. also i did notice it might be leaking a bit of coolent between the head and cylinders. so i guess maybe one of the orings came out of its groove during installation. head is torqued to specs tho so idk if the coolent i see is from when i put new back in and spilled some. Quote Link to comment Share on other sites More sharing options...
tro Posted January 2, 2012 Author Report Share Posted January 2, 2012 just got done double checking everything and everything was where/what its needs to be. i guess its the piston rings. you think with the high compression needed that the rings are bad with the cool head but was able to supply enough for the stock head? thats the only thing i can think of. Quote Link to comment Share on other sites More sharing options...
tro Posted January 2, 2012 Author Report Share Posted January 2, 2012 anyone have any ideas? i dont want to buy a top end kit if thats not the problem. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted January 3, 2012 Report Share Posted January 3, 2012 Is the adapter on comp gauge same length as spark plug threads? Did you buy new or used? Are you sure you don't have big bore domes on small bore? Did you check squish? Quote Link to comment Share on other sites More sharing options...
tro Posted January 3, 2012 Author Report Share Posted January 3, 2012 yes gauge is same length as threads. bought new. they are pro design 21 cc domes. and idk what you mean by squish. sorry. Quote Link to comment Share on other sites More sharing options...
BelleauCarl Posted January 3, 2012 Report Share Posted January 3, 2012 Squish is the clearance between the lower part of your dome and the piston when piston is at top dead center Quote Link to comment Share on other sites More sharing options...
BelleauCarl Posted January 3, 2012 Report Share Posted January 3, 2012 (edited) With little bit of search and some modling clay you should be able to get that top notch Edited January 3, 2012 by BelleauCarl Quote Link to comment Share on other sites More sharing options...
BelleauCarl Posted January 3, 2012 Report Share Posted January 3, 2012 Basicly you ajdust that by milling your head down or shim with thicker gasket under the jug to add clearance Quote Link to comment Share on other sites More sharing options...
tro Posted January 3, 2012 Author Report Share Posted January 3, 2012 ok thanks guys. i will look into that either tomorrow or later in the week and will let you know what happens. Quote Link to comment Share on other sites More sharing options...
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