Remove cam retainer.chaintensioner. variator.behind variator remove 2 screws holding the circular plate. The chain drops down.slide off the crank shaft. & reverse the process for instalation of new chain
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MASTERBATES
TM 150 XRX-P&P head,A13cam,opened exhaust,140 main,38 pilot,adj cdi, perf coil,115mm variaitor,12 gm rollers,NCYpulley,2000 rpm springs,racing clutch,taller rear tires,and etc. 
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