YZ timed WR426
Posted October 03, 2001 - 01:13 AM
Posted October 03, 2001 - 01:47 AM
The only issue seems w/ carburation. A few guys seem to have problems, but many do like it.
One thing you may want to look at is to gear down your bike, depending on your riding areas. I went down one tooth on the countershaft, while others go up two teeth on the rear sprocket. For tighter woods riding, I think it is a very good change.
'99 WZ/YR (you choose!) with ALL YZ mods, de-octopused, DSP Doug Henry airbox w/ velocity stack, FMF PowerBomb header, Stroker SX-1 silencer, SS front brake line, OEM YZ tank, IMS YZ seat.
Posted October 03, 2001 - 07:36 AM
Sure the 426 has a little more oomph, so I would expect a YZ timed 426 to offer greater performance than a 400. In fact, I would think it would be almost perfect for off-road. Perhaps very tight single track WR timing may be better.
Jetting is important, too. Are you running the optimal mixture now?
There's a little less engine braking, but it's not hard to get used to it. I ride 80% trails--I'll never go back to WR timing.
I would say try it-you can always change it back. Use one of James Dean's jetting recommendations for YZ timing. Total cost would be around $30 for a needle, main jet, pilot, and main air jet.
Posted October 03, 2001 - 10:52 AM