250r cylinder head

[dovesprings250R]

How important are the dowel pins that slide into the cylider base bolts. I forgot to install one when re- installing a fresh top end. I've already torqued the jug. It hasn't been fird up yet. They don't appear to be that important. What do they do. Am, I ok to leave it out. Thanks...Dove

[Jason Hall]

O- man you better put that dowl pin in, If you don't your base gasket won't last long. The jug will move even if you think it wont.

[BLAZERONE22]

Yep, you need it...

[dovesprings250R]

OK. Next question then I have everything torqued down but haven't hooked up the carb, added coolant or installed the reed cage yet. The bike has not been started. Can I loosen everything up carefully and install the dowels without replacing the brand new gaskets on the base and head?

[Hornetpowerspor]

Yes that would be fine.

[RideRed250R]

iam runnin my 310 without them
esr told me i could as long as i had it 50 ftlbs
Adam

[Jason Hall]

Dovesprings250R, I wonder if you could roll the motor over to TDC & just slide the jug up enough to clear the studs & slip the dowl in without taking the piston out of the cylinder. I sure would try it anyway.

[crackshot]

Can you rebuild a top end on a liquid cooled R without removing the motor from frame?

[wanta86r]

absolutely

[dovesprings250R]

Thanks guys. I am going to lift the cyliner up off the studs carefully and try to insert the dowell without damaging the gasket. If it looks suspect I'll replace the gasket. Thanks again.