Cam chain question
Posted July 08, 2013 - 06:22 AM
Posted July 08, 2013 - 07:02 AM
I picked up a wr 426 in march of this year. When I first rode it, this bike would do 3rd gear roll on wheelies with ease. I notice the engine was quite noisie so I order a cam chain and installed it and checked the valves. The old cam chain was stretched real bad ,worst I have ever seen and surprise it didn't break. The engine also has a a Wiesco 13 to 1 piston in it and a decompression cam. After I put it back together the bike will not do 3rd gear wheelies as easy as before. The bike feels like my other wr400 and my yz426'. I am not saying its slow, It has just lost that little extra it had. Now could it be that the stretched chain gave me a better cam separation that enhanced the power? If I get an adjustable intake and play with the lobe separation I can find that lost power? Exracer2
Are you running pump gas? 13/1 is stretching it on pump gas and it may have had high octane stuff in it from previous owner on your first ride.
Posted July 08, 2013 - 09:21 AM
The decomp cam you bought, was that for a WR or a YZ426?
Posted July 08, 2013 - 10:12 AM