1977 WR250 Drive Gear

So I'm disassembling the engine to install new bearings and seals and I can't seem to get the drive gear to pop loose. I have a puller on it that is cranked pretty tight (don't what to go to crazy), I tap on the puller and gear itself with a brass hammer but no luck, still tight.
Would putting heat on the gear be ok?? Anybody know of any tricks to get this thing off?

Thank you, John

Yes put some heat on the gear with the puller tight. It should pop off. Do not stand in front of the gear while doing this as when it comes off it will with some velocity. Or to keep the gear from flying off put the shaft nut on just loose to not let the gear fall off the shaft.

Marty

Thank you Marty, I'll give heat a try.

Glad to say, that's all it took. It didn't take much heat at all and it popped right off.

Thanks again

Glad iIcould help and it all went as planned!