[WizardMaster]

OK, I have the Tomberlin Crossfire 150 R powered by a 2005 Kawasaki EX500D engine and it runs awesome................except for one thing.......It will throw the chain when I power up as if to attempt to spin the tires, otherwise I can run it all day long....... Now I thought it was the chain my friend gave me from his Harley Davidson he changed out years ago.The chain is the KX520 and seems to be just fine and sturdy yet and should have been fine for this test before buying a new chain.
Today I re-adjusted the engine to take up chain slack for another test and as I used the engine/chain adjuster, I rolled the cart forward and back and moved the engine a tad more and did the roll test to see if the chain tightened up too much and I found that at one half turn of the rear sprocket the chain was fairly tight and the other half turn it was a tad loose as if the sprocket was lopsided but about 1/4" and a 1/4" can make a big difference!!!!!! I think I found my problem! When they cut down the original sprocket to make rook to lay the original Ninja sprocket against( because I'm sure it was too narrow for a 520 chain system) they welded the sprocket straight onto the Crossfire sprocket, BUT, NOT CENTERED perfectly!!!!!! Anyone could have done his right. I am glad I found this early on. OK, now I need to try and find a 520 rear sprocket with what appears to be a bolt pattern of 4 X 80mm. Can anyone confirm this measurement and lead me to a rear 520 sprocket that will bolt up to the Crossfire buggies? If I must, I spose I could change the Ninja front drive sprocket to a 16 tooth 530 and get a rear 530 sprocket if that is my only alternative,but I believe the thickness won't allow it on the engine side,but I prefer to stay simple and with 520. Thanks for your help on this. Scott