WR426 2001 timing
Posted April 12, 2011 - 04:23 PM
Posted April 13, 2011 - 12:23 AM
And be sure that the marks are shifted clockwize, or else your intakes will have bad time kissing piston, you wont like that metallic sound trust me
Posted April 13, 2011 - 04:16 AM
Posted April 13, 2011 - 05:52 PM
Posted April 13, 2011 - 06:17 PM
Posted April 14, 2011 - 03:55 AM
Posted April 14, 2011 - 04:50 AM
Just for my own sanity I also side by side tonight went through the exact same process of probing TDC on my 06 YZ450 without even opening the timing plug hole to view I probe set to what should be TDC then opened inspection hole to confirm (I) mark is correct and thank god to my sanity is was bang on correct - I know this fact doesn't prove anything just wanted some confidence I was probing TDC reasonably well as I am relying on this method for this WR426
The bad news is though no matter how I set timing which trust me I have tried every way set to I mark set by probing tdc I even set half way in the middle of I mark reading and probing (thought I would split the difference) I have set cam marks inline with head showing 13 pins between the dots I tried set the cams as YZ 12pins between the dots with just the exhaust cam back one tooth and I barley even get a backfire out of it at any setting so I figure this beast probably has bigger issues than just timing but until I confirm it is actually set correct timing I can't move on to other issues
cheers for the help so far if any more thoughts or advice come into you head please reply open to anything at the moment regards Jamie
Posted April 15, 2011 - 05:56 AM
Jamie, your method of finding TDC sounds OK to me, my I mark is also about 10-15mm off, so guess thats just manufacturing defect for 2001 426s. And as I said, even with timing off by 1 tooth and intake valve hitting piston, my bike was starting on the first kick, so I guess your problem is something else.
Posted April 15, 2011 - 06:04 AM
Posted April 26, 2011 - 01:14 PM
Hitman, Your exhaust looks off by one tooth to me. Or is it simply an allusion? I also count only 12 cam chain "pins" between the upper timing marks. I don't have my manual in front of me, but going by memory, I think yours is off. You might want to check the search function to verify. Maniac
The exhaust cam is sat in that position for YZ timing if it is back 1 tooth it will be set at WR timing so for best results with still great reliability yz timing as 'hitmans' setting are, are perfect...
Also i have always found if my wr isnt warm i have to use the choke or the hot start, just throttling a squirt in the bore when theres problems isnt ever enough if you want to be sure the engine runs and recon its the ful/carb or just wonder if its sparking just sprat a little brake cleaner in the airbox...