"Updated Parts" Update
Posted March 07, 2003 - 11:35 AM
1 A uniform taper with a different finish.
2 A lighter flywheel with possibly a longer key.
Posted March 07, 2003 - 12:04 PM
Sorry to be off topic but I would like to ask infos on your bike setup but for any reason I'm unable to send you PMs?
Posted March 07, 2003 - 04:10 PM
Posted March 07, 2003 - 04:45 PM
1-check Flywheel Torque for first time (only started bike in garage) @35 lbs - retorque to 47 lbs. 2-ride bike about 1 mile in back yard. 4 days later (today) check torque before riding, NOT 47 lbs, nut had lost torque. Rode bike for about another plus or minus 1.5 miles. Stop, put bike away, check torque again Not 47 lbs, nut had lost torque again. Saturday I am going to put a couple small center puch marks on the crank and flywheel nut to see if the nut is backing off or perhaps the flywheel is just seating farther and farther onto the crank. How many people have been checking there flywheel torque until it stabilizes.
Posted March 08, 2003 - 05:41 AM
Posted March 08, 2003 - 08:25 AM
I have a question for you, when you recheck the torque are you loosening or tightening the nut? You didn't say, but it takes less torque to remove a nut then it did to install at the proper torque setting. Just wondering.
Posted March 08, 2003 - 08:33 AM
You mentioned this on a different post, but it is worth reiterating here:
"Just a thought, but if there is a backfire and the starter mechanism locks the flywheel and the piston still wants to turn the crank, it looks like the key may be failing because the crank is slipping but the flywheel is locked in place because of the starting mechanism. Maybe the key is breaking to protect the starting gears."
And again here I'll mention, perhaps they should have engineered the starter to free-wheel in the reverse direction ? However, the inertia and speed at which that would happen is beyond the capability of that "juice-can" sized starter. How about a car-like selenoid to engage and withdraw the starter ? Are other bikes like that ? Iv'e placed 80 miles on the bike since the re-tourque but it is now on the stand until this is resolved. If not, I'm tempted to pull off the starter/battery and kick start the bike. Weight savings ?
It will take some YZ replacement parts and creative machining, but I'd rather have that then the bike fail 30 miles into a Utah desert ride. Any thoughts ?
Posted March 08, 2003 - 09:05 AM
Posted March 08, 2003 - 09:26 AM
Posted March 08, 2003 - 07:44 PM
Posted March 09, 2003 - 04:03 AM
Posted March 09, 2003 - 06:25 AM
Posted March 09, 2003 - 08:58 AM
Posted March 09, 2003 - 05:54 PM
I dropped mine off at the dealer with no throttle stop, no baffle, and no gray wire. They fixed the flywheel with no questions asked.
Since you took out the baffle re-jetted, cut the grey wire, your warranty is nul and void
I rode it all day today with aggressive use of the electric starter and had no problems (other than trying to wipe the grin off my face).
Posted March 09, 2003 - 06:10 PM
Posted March 10, 2003 - 02:32 AM
It received a new flywheel, a new woodruff key, and a new gasket. There's no printed service buttetin. Just tell the service tech to call Yamaha before doing anything.
Did they give you updated parts or just retorq?
I tried to get more details but I couldn't talk to the technician who worked on it. The service writer didn't know much about it.