278 Posted March 7, 2009 Report Posted March 7, 2009 Ok guys just got the shee back together... well atleast mocked up, and I was going to break in the motor before I take it apart again to finish the chassis mods (I'll post pics in the next couple days), but the problem is when I went to start it it keeps trying to idle up with out me touching anything... Here's my thoughts- the compression is really high, the pilot jets are wrong because its like 12 degrees outside and I have the stock pilot jets in, I got rid of the TORS system so something is wrong, something in the carb. is sticking... can you guys help me out? Here's my mods if that helps True/welded crank, Wiseco Pro-lite pistons, Agressive trail ported cylinders, Pro-Design cool head w/ 20cc domes, Ported/polished reed cages (by me), Boyesen Dual stage carbon fiber reeds, +4 Timing, Tusk clutch kit w/ 3 HD springs 3 stock springs, Toomey T-5's, 330 main jets, stock carb. Quote
t6shee Posted March 7, 2009 Report Posted March 7, 2009 whats your elevation im running 360 mains @ 2900 ft. sounds like it might be lean. Quote
278 Posted March 7, 2009 Author Report Posted March 7, 2009 whats your elevation im running 360 mains @ 2900 ft. sounds like it might be lean. Im at 0-500ft. and If im lean it might be by one size so Im thinking its the pilots. Quote
sleeper06 Posted March 8, 2009 Report Posted March 8, 2009 Did you pressure test it,most issues like that are air leaks,or lean cond,but your not that lean,I have had plenty of motors thruogh here with aggressive prting on stock pilots and ran good,is it happening off the rev or just sitting there Quote
278 Posted March 8, 2009 Author Report Posted March 8, 2009 I kick it over, it starts first kick, then I just let it sit and it slowly starts idling higher... I amy just have to let it idle for a minute or tap the throttle Quote
spurdy Posted March 8, 2009 Report Posted March 8, 2009 I kick it over, it starts first kick, then I just let it sit and it slowly starts idling higher... I amy just have to let it idle for a minute or tap the throttle Sounds like an air leak. Like Sleeper asked, "did you pressure test the motor?". SP Quote
Screaming Yellow Zonker Posted March 8, 2009 Report Posted March 8, 2009 How does it react when you give it throttle? If it boggs down you could have a fuel flow problem. normally when it gains idle it means it is running leaner. It could be an air leak or running out of fuel in the carb(s)... If it revs right up it could just be that it is warming up and using the fuel better. dont forget to check your plugs. How about the exhaust??? Normal, more or less smoke??? Quote
278 Posted March 8, 2009 Author Report Posted March 8, 2009 How does it react when you give it throttle? If it boggs down you could have a fuel flow problem. normally when it gains idle it means it is running leaner. It could be an air leak or running out of fuel in the carb(s)... If it revs right up it could just be that it is warming up and using the fuel better. dont forget to check your plugs. How about the exhaust??? Normal, more or less smoke??? Thats what IM wondering if its just warming up, I dont really know on the exhaust Havn't even broken it in and I only ran it for like 3 couple second periods... Ill just try it tomorrow and let you guys know how it goes. Thanks for the help Quote
jlsparky7 Posted March 8, 2009 Report Posted March 8, 2009 I kick it over, it starts first kick, then I just let it sit and it slowly starts idling higher... I amy just have to let it idle for a minute or tap the throttle That makes ALOT more sense than your original post. Because the quad is supposed to idle when you arnt touching it. Anyways... Prolly an air leak or your idle RPM is set just a hair too high. When you open it WOT and let the throttle go does it hang at a higher rpm for a sec then go back to normal? If so its prolly that the RPMS are set too high. Quote
sleeper06 Posted March 8, 2009 Report Posted March 8, 2009 I still say do a pressure test just 4 peace of mind,but lean on the air screw or pilot will do it 2.How does it sound, alot of my basic tuning is done just by the tone of the motor Quote
AKheathen Posted March 8, 2009 Report Posted March 8, 2009 If the fuel is cold, it will not atomize nearly as good untill it heats, like in the case as the engine is starting to warm up. hence, the need for a choke. start it up and turn the idle down as it rises, and you'll probably have to drop the needle a bit. i just got some new ones that fit the larger jet sizes (thicker and longer) did you try out that torco? Quote
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