I have just ordered replacement JT sprockets from Busters Accessories. What arrived was a rear sprocket marked AFAM (not JT) Front Sprocket no name and has offset described with gear not being central.   Phoned to return and they said they didnt specify a brand. I said they did as product description talks about JT quality..   I tried to ask what is happening as someone else has same thing happen. Got standard answer selling lots and I should send a letter with the