toyotaman Posted January 2, 2008 Report Posted January 2, 2008 I bought a motor off of Ebay, it had never been fired and the guy I got it from didn't know much about it. He got it from a friend who supposedly built it at a shop he worked at near Portland Oregon. The reed spacers have Moore performance stamped on them. I've taken it to some of the local shops, and here is what I know so far. It is bored 50 over, ported extensively for top-end, lightened flywheel, Wiseco pro-lite pistons, Pro-design Coolhead w/16cc domes, V-force reeds w/aluminum spacers, boost bottle, stock carbs w/tops TORS eliminated, 330 main jets, needles are on 4th groove, stock pilot jets, dual KN pods, Toomey T-5's, Dyna ignition, adj.timing plate. I got just the motor off Ebay and already had the carbs from my other motor that blew up. I put the 330 mains in it. I had it leak tested(It's tight), had idle screws tapped into the carbs. It was adjusted to run and idle by a local shop. It runs and idles good, but has no top end and bogs at at anything past 1/2 throttle. I was running a 40:1 mix with Yamalube oil. I mixed 2 gal. of premium and 3 gal. of 110 oct. race fuel. I did this at 1800' elev. but want to set it up for the coast or sea level (dunes). Plugs were black at that time. The Dyna ignit. is set to stock, but there is also an adjustable timing plate on it. If i'm reading it correctly, it's advanced 8 degrees. that seems like too much. I'm not sure if I'm doing it right, but I'm reading it by the tick mark that is in line with the split in the case. I know that there is many variables, but I'm not a pro racer or even a mechanic, I just want to get this thing to where I can ride it without it blowing up and then fine tune it. Should I be running higher octane, like 114, and possibly be doing without the premium mix?Is my timing too advanced. I really need some suggestions on basically everything!!!!! I'm overwhelmed,Please Help! Quote
broke Posted January 2, 2008 Report Posted January 2, 2008 (edited) Dependind how extensively that exhaust port was cut, I would say straight 110 is what that motor needs with 16cc domes. I would start there, it might be detonating to bad to ever have good top end. Edited January 2, 2008 by broke Quote
Snopczynski Posted January 2, 2008 Report Posted January 2, 2008 Sounds like it has some Dave Moore Racing components on it. I agree about needing to check the port durations to know how its ported. It isn't a stroker or a long rod motor or anything then? Spacer plate on cylinders, or pistons that stick out above the deck at tdc? Quote
dajogejr Posted January 2, 2008 Report Posted January 2, 2008 Depending on your elevation...I'd say here's your problems. 16cc domes, so much compression can kill top end. Dyna's stock curve advances it 4 degrees at lower RPMs...and a few at higher RPMs, coupled with the plate, that could effect top end. Set the plate to 2 degrees... Stock carbs on a ported motor...that could hurt some top end. I'd start with 18cc domes...let the motor free up a bit and spin.... and I would use 110 straight race gas.... Sorry, just read you're at sea level.... Put larger domes in...that motor is fighting to spin at high RPMs. 16cc domes are fine if you ride above 5000 feet...but at sea level, I'd bet your compression is easily up over 210PSI or so.... Quote
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