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Discussion Starter #1
Hi every one :D well my problem is my X husband started to rebuild my VS750 in april,
then we split up in june :p:p:p hurrrrrrrrrray,the engine is on the bench with the cams in and the chains on
but when i put the covers on and ajust the tappets its jaming ? checked the marks on the stator
RF/T set on the T pionter for the rear,great valves flat on TDC, line on cam leval with head ,set tappets engine turns fine!
turn engine clockwise to FF/T mark line up marks fine, as long as the tappets are like 10m gap its fine but
when i ajust the front tappets to .004/005 then turn it,it jams ? this is my baby and was running great,
now have looked on here and some one else had this problem along time ago ! 2012 i think ?
he asked Dr Bob but i cannot find any reply ?
Has my X done some thing to my engine just for spite ??????
yes im a girl but love getting down an dirty with the guys :bluethum:

PLEASE PLEASE PLEASE HELP
 

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I kind of doubt that anybody can help with that by remote control.
It's a "hands on" kind of thing to actually SEE what is happening.

It almost sounds like you now have the wrong valves or pistons.

Alas Dr. Bob isn't with us anymore.

Good luck.
 

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Discussion Starter #3
Thank you for your reply,but all that was changed was the cam chains!
nothing else, the heads stayed on, the same cams that came out went back in ?
F to the front and R to the rear as stated in the manual,in the right configeration ! but jamming on the front when ajusted ?
after ringing him today and asking him what was done ?
sadly hes not able to fix it for 18 months if you know what i mean !!!!!!! LOL
 

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Discussion Starter #5
EEEEEEEEEEEERRRRRRRRRRRRRR yeh ! thats what i said !
the vavles are jaming when ajusted ?
on the front exhaust,the rest are OK ?
thats why ii camme here ,thought you guys might be aable to help ?
im just a girl that is just tryinng her best to geet the f============ing thing going again !!!!!
 

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Nobody here is clairvoyant so we can't SEE what you actually have there......and
I don't think we have any mechanics here any more with enough experience to give you any specific educated guesses.

Sorry. Maybe I'm wrong and someone will offer some advice.
 

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Can you elaborate on what is actually happening.... if the rising piston is hitting a valve/s left open due to the timing issue you need to get to a basic timing setting.

To do this you need to determine when TDC on the firing stroke of the offending cylinder is then turn the asociated cam, (free of the chain), so no valves are open at all. Once this is done you should see some marks on the stator nearly lining up to another mark....either on the case or just ajacent of the stator or some dots on the cam gear that line up with some on the head.

You may find the cam gear is 180 degree's off from the cam shaft if it has been removed....usually three bolts hold them on if they are this type of setup.

At this stage you fine tune the timing.

Good luck
 

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Discussion Starter #8
Thank you all for your help,iv got a friend coming round today to have a look !
he has a good idea of cars so hope he can fix it ?
if not the girls and i will smash it to bits in a KILL THE VS750 ENGINE party,
insted of bring a bottle you bring a hammer LOL
XXXXXXXXXXX
 

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Hi could tell u what is wrong but to many doctors & to many guesses, get the factory shop manual & go step by step, than it will be good. NO guess work
 

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Discussion Starter #11
Hi guys well still a NO GO on this engine ,
my friend is stuck at work,covering for a none show after holidays,
so its just sitting on the bench covered in a tee shirt !!!!!
as for your comment Mr suzukitech,
i have a manual and iv read it that mant times my eyes are sore ! i have gone through it over and over
iv had 2 of my girlfriends read it to me,they have also confirmed what im doing is right but still jams?
to be honest i think this is a JINKS on it ????
i love this bike so much you would not belive it,but now im considering selling it on Ebay as a project
it will break my heart but i would sooner get rid of it to someone who can fix it and enjoy the last weeks
of summer,than just leave it here doing nothing!
ill keep you all imformed of any progress i might have,
Thank you for all yout help !
XXXXXXXXXXXX Chistine
 

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Just a girl? No such thing. Can you post some pics of the timing marks at the crank and cams? I have a 2000 VS800 and a shop manual, also I’m a veteran automotive tech. I’m sure we can figure out where the problem is. The advice to start over with the timing is a good one.
—-Dan—-
 

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You need to elaborate on how it jams...if it is the piston hitting the valve or some other way. I mentioned the cam shaft sprocket may have been removed....some do have a bolted on sprocket... and it may have been fitted 180 degrees out.
 

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Discussion Starter #14
Hi guys SORRY for delay replying been away !
right took a few photos so here goes ?
so not allowing me to add photos ?
but this is wot im doing,both cams out,turn engine to RF/T pionter rear cam with the R ON IT
fitted,line up with head,check picture in manual the dowl is in the same place !
turn engine 360 clockwise to the FF/T aline with pointer put front cam in set with line leval with head,
check manual dowl in right place,put cam covers on turn engine anti clockwise to RF/T set tappets to 0.04 thu
turn engine 360 anti clockwise till front at TDC (probe in cylinder) at tha point bot front loes set both inlet/exhaust
at same time 0.04,turn engine anti 360 fine then try to turn again 1/2 way round pisto coming up JAM ?
if i undo tappets on exhaust the engine turns over ?
i have eight photos i can send to a Email address if this helps ?
 

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Just for clarity, you say you adjust the lash to .04 Is that mm or inches? The spec is
.004” or .08-.13mm. We should be on the same page with critical measurements.
 

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Discussion Starter #16
.004 sorry put dot in wrong place,
Right my friend who messes with cars came round,
and checked what id done and said seems right !
but STILL took it apart yet AGAIN ?both cams out!
RFT rear cam in lined it up perfect !
turn engine C/W put front cam in,line up perfect ?
turn egine anti clock to RFT set rear tappets,
turn to FFT set tapperts
turn egine CLUNK exhaust valves hittint piston on the up stroke ?
put a tiny cammera (bore scope) down plug hole to see if any
thing dropped insise and was jamming it clear?
contacted guy were we got new cam chains from,there the right ones for
VS750/VS800 from 1989 onwards ?
the only thing my fried said to try is stripping it back to before we started,
put old chans in and try that ?
but when my oldman took it apart and put back together i took loads of photos,
checking manual with them its correct?
so no piont stripping ?
we are stuck !!!!!!!!!that guy suzukitech you said you know whats wrong !!!!!!
so im asking you for your help !!!!!!!!!!!!!!
 

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I’ve been reading the section on this in the Clymer manual and I don’t see anywhere it say to turn the engine clockwise, ever. The reason being that when you do, you compress the tensioner before rotating the connected camshaft. You should only ever be turning it counter-clockwise. You may be slipping the chain on the crank sprocket and throwing the rear cam out of time before installing the front cam. Just my gut feeling from what I’m reading both here and in the manual.
 

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Discussion Starter #18
lets try again,i set the tappets to 0.004 inch,this because the LASH as you call it is be tween 0.003 to 0.005
and 0.007 and 0.009 inch exhaust but because the exhause valve is hitting piston i set it to 0.004 hoping
this might clear ?
been down our bike shop today looking for a NEW BIKE !
talking to sales man told him about this sh*t im having he called his mechanic in
told him about the problem,he said because its a V TWIN one cam per set of valves exhaust
and seperate intake he would try advancing 1 tooth on the cam !that would close the offending valves
and because its exhaust it would basically be like setting it to .0.015 and would not effect the running,?
BUT IT WOULD ONLY WORK ON A SEPERATE EXHAUSE / INTAKE CAMS
a 4 cylinder 2 cam would not work !
said there is alot of tolerance on this engine,to prove his piont he asked how bad the old camchains were,
told him there was NO pressure on them, no ajustment left on tentioners chains CLANKING, sounded like cement mixer !
there you go them cams were way out because of all the slack !
just set one tooth advance !
so what do you guys think ?????????
iv not tryed it yet !
 

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Discussion Starter #19
Hi grgmini go to page 59 in the clymer manual !
CAUTION
If the rear camshaft has been removed,pull up on the camshaft chain and keep it taut, make certain that the camshaft

chain is properly meshed onto the crankshaft timing sprocket then rotate the crankshaft. If this step is not fol-

lowed, the chain may become kinked and cause damage to the crankcases,

the camshaft chain and the timingsprocket on the crankshaft.

17.
Use a 17 mm socket and wrench on the alternator rotor bolt (Figure


20). Rotate the engine clock wise,
as viewed from the left-hand side, until the

other sprocket bolt is visible.






18.
Straighten the tab on the other camshaft
sprocket bolt lockwasher and remove the exposed
bolt and the lockwasher.
19.
Disengage the camshaft drive chain from the
camshaft sprocket and remove the camshaft.
20.
Tie a piece of wire to the camshaft chain and tie
it to an external portion of the engine or insert a long
drift or long socket extension through the camshaft
drive chain
(Figure
23) to prevent the camshaft
chain from falling down
into the crankcase.
 

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Discussion Starter #20
definitely says CLOCKWISE !
and says clockwise futher along regarding setting rear camshaft
and front camshst ?
 
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