TOPIC:

So you're saying don't mill the head and wait till I do the 810
and let the bigger bore rise the compression ?

Another question you think going to a larger dia.
header tube will help or hurt the power ?
Nobody makes a sidewinder to fit so was thinking a KZ900-1000
pipe cut to fit as a step header set up.

Bigger bore in itself wont do much compression wise,but an 810 piston that matches the gpz combustion chamber would definately help.
Id try a Skinnier rear tire to flatten contact patch if it were me anyway

zukdave wrote: At about 20 lbs. there ain't much more to take out.
The 130 tire on the stock 2.15" rim's
sucked in and not using all the tread.

Calling Buchanan's spoke and rim in the morning
to see about a 3 1/2" maybe 4" black anodized alum.
rim and spoke set.
With the gpz swing arm and some offset sprockets
I can fit a five inch slick easily and 7" stuffed.

Is thew gpz 750 arm that much wider?
I dont remember the 81-82 arm with dual shocks being any wider than stock 900-1000 arm,a 3" rim and a 130 tire is usually about it in a stock 900/1000 arm anyway.

+1 - if so...maybe I need to look at swapping one of those arms over...

The arm is off an 83 unitrack.
Best pic I have right now but I'll get one today with a tape on it.

I'm running the GPZ swing arm like pictured. It' a bit longer too which helps keep the front wheel down. With the stock arm I'd do wheelies all the time and now it's real hard to do wheelies and when I do lift the front wheel it comes down quickly. It's funny years ago when I said my hot 650 went low 12's almost every one told me I was full of s#!t. I never tried a wheelie bar.

Mark

Mark Wing wrote: I'm running the GPZ swing arm like pictured. It' a bit longer too which helps keep the front wheel down. With the stock arm I'd do wheelies all the time and now it's real hard to do wheelies and when I do lift the front wheel it comes down quickly. It's funny years ago when I said my hot 650 went low 12's almost every one told me I was full of s#!t. I never tried a wheelie bar.

Mark

Its that good california air Mark!

Mark the arms's 2 1/2" longer then stock.
I get the same chit from folk's thinkin I'm talkin trash
when I tell them my junk go's mid to low 12 second's.

F@$&em I got a time slip that told ME that's all that count's!!!!!!!!!!

Back to the arm here's some pic.s

Its that good California air Mark!

The 1000's I was spanking were running the same air.


Dave I used the bearing sleeve from a GPZ 550 with my 650 pivot bolt and it all bolted together

Its been a while since Ive been to our local 1/8 mile since I sold my 1327,but from what i remember strapped down busas were running 6.70-6.90 range with a little motor tweaking and a pipe around here in the 1/8 around here anyway with decent riders.
best I ever got out of the 1327 was a string of 6.15-6.18s /115 and change with no bar and lots of traction issues

Mark thank's for that info.
I was going to ream the frame hole
to fit the 750 bolt.

My sleave's are already trimed
to fit the frame but a 550 sleave
would be a better way to go.

wireman wrote: a string of 6.15-6.18s /115 and change with no bar and lots of traction issues

Best to date 1/8 mile was
7.81/88.08

I'll go set in the corner till
I get some big boy panty's.