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Old 07-23-2018, 07:54 PM   #29
ChrisWNY   ChrisWNY is offline
 
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Join Date: Jul 2018
Posts: 212
Quote:
Originally Posted by blanc12 View Post
The damage to the piston is more than just a dropped valve. It got really hot. Lean mixture is the most likely reason.

If it was so lean that the engine melted down, wouldn't the engine have stalled or bogged down with the choke off? Usually super-lean engines won't run unless they're choked (or they bog badly when the choke is off).
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2018 RPS Hawk 250cc
Mods so far:
1. Mikuni VM26 Carburetor w/#115 main jet
2. 17T/45T JT sprockets
3. JT 428 X-ring chain
4. Air box mod
5. Hawk Digital Cluster
6. Aftermarket IMS shift lever
7. Performance Aftermarket Exhaust
8. 295mm Nitrogen Gas Monoshock, 20W oil front forks


 
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