87' Cylinder and crank on 85' 250r?

[MorningWood]

I just bought a brand new 85' 250R cylinder,piston, and head for my trike. I just blew a head gasket on the old head and wanted to replace the whole top end with my new parts. The shop called me today and said I have a 87' 250R long throw rod and cylinder installed on it and I cant use my new parts I bought. They also said I'm on my last bore and they will try to hone it and put a new piston and my new head on the old 87' cylinder. If not, they will try to find me another used 87' cylinder. Should I rebuild the crank back to stock and use my new stock parts or keep the 87' mods?
Any one have any sugestions? :doh:

[ATCRYDER]

:shrug: Wish I knew--looks liek no one else has anything to say either---sorry :eek:

[atc330r]

you lost me?? you said you bought a new cly piston, head (85) crank has a 87 rod (long rod). then you go back to honing a cylinder??? use the new cyl with a spacer under that????? or did you buy a new used cylinder ????

[Dirtsquirt]

Those guys you are dealing with a jackasses (or are part of a Honda shop)

a simple spacer plate will get you running again with all the '85 stuff.

try ESR for that plate

http://www.esr250.com

if they don't have it them CT will

http://www.CTRacing.com

What is the bore on that '87 cylinder? I know that wiseco and pro-x make pistons above Hondas +.080 over.

My guess is that you need to find a better shop or DIY.

[Mr. Richard]

the wiseco 526 which fits the 85-86 250r's goes to .140 on the other hand the wiseco 562 which fits the long rod motors only go to .080,,,

this info is in my wiseco book too..............

[macanic]

Hey Dude
just use the cyl. spacer
works great makes more controlable power
get you a cool head and 19cc dome
38-39 mm carb
and your off to the races we call it a 265cc
happy riding!!!!!

[MorningWood]

Thanks for all your help guys. The shop ended up putting a spacer plate around the long rod and installed my brand new 85' cylinder,head, and piston to it. I broke it in over thanksgiving weekend. Starts on the first kick. The old 87 cylinder was on its last bore. 80 over I kept it to re-sleave it later. :p