I've ordered a Hot Cams Exhaust cam, new cam chain, and a metal plug to replace the decompressor gizmo.
Thought it might be a dirty carb, so installed a JD jetting kit (had great luck with those in the past), a flexiJet fuel screw, and a Boyesen Quickshot3. Gave the carb a thorough cleaning, replaced most o-rings, and did the AP o-ring mod.
It runs fine once it is started, but dang is it hard to start. Last weekend kicked it for an hour before finally getting it started. It did sound a little lean to me (no bog at all (before installing the QuickShot) and some minor popping on decel. Cleaned the carb in the past few days and put on the JD kit, FlexiJet and Boyesen. Kicked it over so many times yesterday and never got it started. So many time that I actual tore up the bottom of my Alpinestars boot
Here's what in the carb:
Currently at 6600 feet, but will ride it mostly at 8500-11,000 feet.
Fuel screw out 1 1/4 turns.
JD Red needle - 4 notches from the top.
Main jet - 160 (from the JD kit).
Starter - 65
Pilot air jet - 75
Main air - 200
Pilot jet = 42 (from the Jd kit).
The Quickshot is about 1 turn out, maybe 1 1/8th.
Air filter is clean.
While I was cleaning the carb the squirting seemed good. I was amused how many times it squirted with the fuel line removed.
The jets I reused seemed clean and I soaked them in carb cleaner and dried with air compressor.
Things I haven't done yet:
- try starting with choke off.
- try starting with Hot Start on, even though it's a cold engine.
- pulling the plug and checking spark.
- checking valve adjustment (was supposedly done regularly, I'll have to do this with Hot cam anyway).
Anything else you can think of?
- Checking timing chain.
Edited by noosphere, April 23, 2012 - 04:16 PM.