Jaystre Posted October 26, 2013 Report Posted October 26, 2013 Is it possible to be lean on the needle but not on the main ? like it would be slightly detonating at half throttle but at full throttle be fine. Quote
sprinklerman Posted October 26, 2013 Report Posted October 26, 2013 Most definitely Sent from my SCH-R970 using Tapatalk Quote
Jaystre Posted October 26, 2013 Author Report Posted October 26, 2013 how would i go about tuning it? ... a plug chop wont tell me if its lean on the needle Quote
Strm Trpr Posted October 26, 2013 Report Posted October 26, 2013 What carbs are we talking about here? If we are talking about stock carbs, then you need to pull the carb cap off one carb at a time and use a Phillips screwdriver about 1/8" in diameter. Remove the screws and plate that holds the cable end and slide spring will lift out. Then the needle should slide out. C-clip in the top groove, (blunt end of needle) lowers the needle into the needle jet leaning the circuit. C-clip in the bottom groove raises the needle richening the circuit. Middle groove is where I run my clip and it flat out boogies. Quote
Strm Trpr Posted October 26, 2013 Report Posted October 26, 2013 Well then, there you have it. Do you still have TORS? Quote
Jaystre Posted October 26, 2013 Author Report Posted October 26, 2013 no tors ... motor passed leak down test and compression 155 psi ,squish is at .042 , sea level . its blowing o-rings and backing out plugs Quote
Strm Trpr Posted October 27, 2013 Report Posted October 27, 2013 If it's blowing out o-rings and backing out plugs, it's detonating. Stop now, do not pass go or collect $200. 1 Quote
trickedcarbine Posted October 27, 2013 Report Posted October 27, 2013 no tors ... motor passed leak down test and compression 155 psi ,squish is at .042 , sea level . its blowing o-rings and backing out plugsYou running pump gas? The squish is on the WAY TIGHT side and cranking compression is a borderline indicator. Quote
Jaystre Posted October 27, 2013 Author Report Posted October 27, 2013 (edited) yes premium pump gas (91) Edited October 27, 2013 by Jaystre Quote
Strm Trpr Posted October 27, 2013 Report Posted October 27, 2013 You might want to do a 50/50 pump/race gas blend. Do you have an adjustable timing plate? If so, what is it set at, and maybe set it to 0* and see if it stops backing out plugs. Advanced timing increases combustion pressure exponentially vs smaller cc domes. 155psi cranking compression is pretty high on 91 craptane... Quote
Jaystre Posted October 27, 2013 Author Report Posted October 27, 2013 timing is at +4 ... don't really have access to race gas but maybe avgas Quote
sprinklerman Posted October 28, 2013 Report Posted October 28, 2013 You can do a plug chop for needle position. Just do a half throttle run and follow the same procedure as a full throttle chop. Fyi. After you feel what the bike should feel like on the needle, you can do it just by riding it. Sent from my SCH-R970 using Tapatalk 1 Quote
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