I dont know if anyone here is messes with old style 50s... Figured it try it out.

I bought a 1984 Z50R. Its sweet. Fired up and was riding right away... but DANG is that thing SLOW!! Are they all that slow? Or does mine have issues?

I did a new carb, intake, gaskets, spark plug, oil, gas, etc etc

What the....?

 

they have a much lower compression ratio than the modern xr/crf i think it's like 8.5:1 on the Z motor, where as the xr/crf is like 10.5:1. plus their trannies are geared wider than the CRF making it feel even more sluggish

but when they are rapped out in top gear a Z will walk a CRF ( both stock that is)

 

ahhh thanks man. I new to the oldies

 

anytime! that's what forums are for

 

yea my 69 z felt SLOW next to my stock crf... but I put a 04 crf carb on it and it helped a bit on the top end.... but your 84 is lightyears ahead of my 69.. it even has rear suspension

 

i have a 1982 z50r and its also slow as **** but mine is been ridden alot so my rings are shot so maybe a fresh hone and a new set a rings will help out alot
and if you are up to it that mill your head or find a thiner head gasket to make a higher compression ratio that will help out alot

 

i have a 1983 z-50 and it is fast as hell it was slow hut i went and bot a tune up kit for honda put it in and know it is fast

 

I have a 1982 but i have no spark.. any idea why not, it was sitting for awhile. I cleaned the carbs, and new spark plug, but still nothing.

 

anyone know how i can figure out what year mine is? originally i thought it was around '75. now im thinking it might be late 60's. im not sure if the gearing is really wider on the z's, mine seems super close. it might just be that it is geared super low, i can start off in 3rd gear no problem. i think i may clock(radar) mine before i rebuild it 88cc. =)
edit: wait... no maybe its not late 60's. i have rear suspension, headlight, taillights, but no turn signals or reflectors. its red with minitrail sticker on the tank.

 

the crf's had a larger carb and intake too until the new 07's.........

there also lighter........

 

sounds like its a 70's model for sure........

 

Im not done gathering all the pics for all the years. But this might help.

 

want a pic of it? im gonna try to find somebody who can actually snap a couple shots of me, when i do ill take a few of the bike.