Evo Top End Rebuild Questions....
#11
Join Date: Feb 2008
Location: Kansas City, MO via Millington, MI
Posts: 545
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Ok...
Thanks to everyone for the advice. John from MIA Cycles called me and gave me some good advice, and I decided that while I had the heads off to get them shaved, I'd have them rebuild the heads.....money I didn't want to spend, but the local indy is taking care of me on the machine work. New valves, seats, seals, guides, port & flow, resurfacing...should be a nice little improvement. I noticed the exhaust valves had play in the guides, so I might as well do it all at once.
Found out that the original owner must have put in an SE-H3 cam at some point, with adjustable pushrods, but from what I can tell, the ECM was never remapped correctly for the Stage 2 kit. Hell, the thing still had stock pipes on it when I bought it. The exhaust valves where almost pure white, and there is a ton of carbon built up on the tops of the pistons. Cylinders look pretty good for the most part, with very minor scuffing from the piston skirts. Pretty much what I expected to see.
Should have the heads back by Monday (fingers crossed) and my replacement-replacement rocker boxes should be here by Wednesday. I'm going to try getting the cam side of the engine put back together tonight.
Looks like I'm going to have to get with Jaime at FuelMoto for a better calibration.
Thanks to everyone for the advice. John from MIA Cycles called me and gave me some good advice, and I decided that while I had the heads off to get them shaved, I'd have them rebuild the heads.....money I didn't want to spend, but the local indy is taking care of me on the machine work. New valves, seats, seals, guides, port & flow, resurfacing...should be a nice little improvement. I noticed the exhaust valves had play in the guides, so I might as well do it all at once.
Found out that the original owner must have put in an SE-H3 cam at some point, with adjustable pushrods, but from what I can tell, the ECM was never remapped correctly for the Stage 2 kit. Hell, the thing still had stock pipes on it when I bought it. The exhaust valves where almost pure white, and there is a ton of carbon built up on the tops of the pistons. Cylinders look pretty good for the most part, with very minor scuffing from the piston skirts. Pretty much what I expected to see.
Should have the heads back by Monday (fingers crossed) and my replacement-replacement rocker boxes should be here by Wednesday. I'm going to try getting the cam side of the engine put back together tonight.
Looks like I'm going to have to get with Jaime at FuelMoto for a better calibration.
Last edited by Rocketman69; 04-02-2009 at 11:33 AM.
#12
#13
#15
Every time I head out on mine, I ALWAYS think the top end is too noisey. Sometimes it drives me crazy and I"ll ask my indy about it. He'll listen to it and tell me he hears nothing out of the ordinary. I asked about cam bearing and, he told me it would start to "howel" if the bearing was on the way out. I once thought I was having top end ratteling but it turned out that the front pipe heat shield clamp was lose and ratteling around. I chased that one for a while. lol Gas caps rattle around too!
#17