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Re: Bought a 1988 paso 750. wow

Posted: Sat Jul 16, 2011 8:49 am
by Biohazard
wow. thought all heads need a gasket.....ok will check there thanks

Re: Bought a 1988 paso 750. wow

Posted: Sun Jul 17, 2011 1:22 am
by Mc tool
Yeah , It was a new thing to me too.There is a raised area round the top of the bore and a similar recess in the head and if there are signs of leakage ( carbon deposits ) an light lapping in with fine grinding paste is the go . I have read that sometimes these heads can warp enough to cause head/cyl sealing issues next to the exhaust valve , although I have never actually seen or heard of 1st hand, probly have to cook it !

Re: Bought a 1988 paso 750. wow

Posted: Mon Jul 18, 2011 8:21 am
by paso750
biohazard. I sent you a pm (already 5 days ago) :)

Re: Bought a 1988 paso 750. wow

Posted: Mon Jul 18, 2011 1:56 pm
by Biohazard
sorry been busy, got it checkin now.

Re: Bought a 1988 paso 750. wow

Posted: Tue Jul 19, 2011 11:06 am
by Biohazard
now the chain is brand new and too long. i got a chain breaker , but was told to bring the back wheel forward a notch or two first then make the chain to length,, then bring the back wheel back again. how do u make sure the wheel is straight, so the chain isnt cocked ? how tight do u want the chain.

Re: Bought a 1988 paso 750. wow

Posted: Tue Jul 19, 2011 3:19 pm
by scimmione
With the the pinch bolts loose on both sides and the large hex head axle nut loose on the chain side, rotate the axle eccentric using a hex wrench on the brake side of the wheel. The eccentrics will rotate equally as you turn the axle. You may need to relieve some weight by lifting the rear wheel slightly while you turn.

Re: Bought a 1988 paso 750. wow

Posted: Tue Jul 19, 2011 4:04 pm
by Biohazard
i see and u must not need to turn very much for it to move the wheel then. then make the chain to fit with a little play, then turn eccentrics to move wheel back to take up the chain slack ?

Re: Bought a 1988 paso 750. wow

Posted: Tue Jul 19, 2011 4:59 pm
by scimmione
Biohazard wrote:i see and u must not need to turn very much for it to move the wheel then. then make the chain to fit with a little play, then turn eccentrics to move wheel back to take up the chain slack ?
Exactly. You'll want to get the axle as close to 'bottom' position as possible to give yourself some adjustment room once the chain has stretched. Or the 'Top' position if you're running a tall tire. (140/70 or 180/60)

Re: Bought a 1988 paso 750. wow

Posted: Wed Jul 20, 2011 11:42 am
by Biohazard
bottom meaning forward, and top meaning back, correct? tyres are factory. about a year left on them. then time to empty my wallett on new tyres. ouch.

Re: Bought a 1988 paso 750. wow

Posted: Wed Jul 20, 2011 3:46 pm
by scimmione
Sorry, not 'bottom of range' but actual position:
This shows the eccentric at just 'behind' the bottom position.

Image

(Apologies to Randtcastell - no copyright infringement intended)

Re: Bought a 1988 paso 750. wow

Posted: Wed Jul 20, 2011 4:06 pm
by Biohazard
sorry, i see the center bolt to loosen, but what is the eccentric, and what does it do?

i would google a bit more but on my cell dont have net at the house yet, limited data on phone.

Re: Bought a 1988 paso 750. wow

Posted: Wed Jul 20, 2011 4:18 pm
by paso750
You see that round thing where the axle is ? The axle is not positioned in its center but off center. That part is called excenter.
If you turn it so the axle is moved to the rear you tighten the chain, turning it to the front will slacken it.
As scimmione mentioned the normal position is with the axle towards the bottom. Then adjust it back or forth as required.
If you rotate the excenters by 180° with the axle in the upper position the rear of the bike will sit a little lower.

Adjusting the chain is all explained in the user and workshop manual.

G.

PS:
tyres are factory. about a year left on them.
What production date are they ?

Re: Bought a 1988 paso 750. wow

Posted: Wed Jul 20, 2011 6:28 pm
by Biohazard
will check the tyres when i get home. i understand now... mines not as clean as this one ...

Re: Bought a 1988 paso 750. wow

Posted: Wed Jul 20, 2011 7:21 pm
by streetsurfer
Have you loosened the pinch bolts yet?
Take care in doing so. Galvanic corrosion oftens sets up
inside the swing arm on the lower bolts end.
Forcing it without some preparation may lead
to stripped threads in the swingarm.

Re: Bought a 1988 paso 750. wow

Posted: Thu Jul 21, 2011 12:32 pm
by Biohazard
not. yet. like said,im getting as much info before i tear into this. gonna order the alt. cover puller next week, then that weekend start doing a few things will keep ya updated pics etc.