Uhappy with YZ time?
Posted March 29, 2004 - 11:31 AM
I expected it to have a real midrange like the YZ's I've ridden. But I seem to have lost the low end snap I used to have for a bit of a 2 stroke like peakiness.
Yeah there is a little Mid hit but no more top end and the bottom is mellow when it used to explode off the bottom with WR timing. Am I missing something? My wheelie skills just went out the window with YZ timing!
My mods are:
Full Ti-4 w' powerbomb
Carbon fibre airbox.
162 main, DRQ-4 40 pilot 2 turns out
The one thing I notice is less stalling, I think I am riding the bike higher in the rev range and that is keeping me from blipping the throttle at low revs which I think used to load up the motor with gas causing stalls.
I'm thinking of going with the JD jetting kit.
Do you guys think that will help.
I noted I had to drop the pilot with the James Now.
With the stock 42 the idle dropped as the bike warmed up and I actually foulded a plug for the first time in 3 yrs.
Posted March 29, 2004 - 11:41 AM
It's been 2 years so I don't recall too clearly but I seem to get out of corners faster. I seem to rev a bit higher before letting out the clutch out of (in) the corner to get the rip going.
Posted March 29, 2004 - 11:45 AM
Posted March 29, 2004 - 01:19 PM
How did you time everything? Are you going by the marks on the chain or actually timing the crank to both cams without looking at the chain marks? the later is correct on how to do this. it is very easy to get some slack in the chain and have it jump the crank gear a few teeth.
Also how is the jetting? Any bog?
Posted March 29, 2004 - 03:31 PM
Posted March 29, 2004 - 03:32 PM
Posted March 30, 2004 - 04:00 AM
It should give you piece of mind just knowing that the bike you ride does not have retarded timing.
Posted March 31, 2004 - 09:20 AM
"I" mark in the window
Intake came "I" mark right on the head surface.
Exhaust cam "E" mark one tooth up from the head surface, which I believe is YZ timing.
No I did not zip tie the chain to the intake cam and had to put it all back together, but it looks the same as the other 6-8 times I've had the cams out in the past, except the ex cam is turned one tooth clockwise from stock.
Do you think the whole works could be retarded 1 tooth all around?
Would the bike even run then?
Note the ex cam is retarded if the motor turns counter-clockwise and advanced if it runs clockwise.
Posted March 31, 2004 - 04:53 PM
Put the crank at TDC in the timing mark and then line up the cams as such:
Posted April 01, 2004 - 10:08 AM
Ya think I did something wrong?
The bike starts and runs fine, I just lost all my low end hit and got back a little peakiness, runs like a 2-smoke now. Gotta use the clutch where I used to just turn the throttle.
Posted April 01, 2004 - 10:39 AM
I have YZ timed Wr426 .Any gear, any RPM , crack the throttle and she goes like a cut snake..even from chugging speeds.
Posted April 01, 2004 - 11:09 AM
Posted April 02, 2004 - 04:43 AM
Posted April 02, 2004 - 08:44 AM
The bike exploded off the bottom before I adjusted the cam timing. It still starts and runs fine just not what I expected. I'm sure the crank "I" mark and the intake "I" mark were all perfect. The ex cam it ot be turned one tooth clockwise right? Not counter-clockwise or anything like that.
I might just change it back and see what happens.
Posted April 05, 2004 - 05:36 AM