cam/valve train removal on ex 250 ninja

no manual here;
any trick/procedure for easier removal of head on 250 ninja;
have not previously dealt with automatic cam tensioner, so am guessing it
has to be removed first...

tia

 

If you're puzzled about how to get something this basic apart, you
need a manual. You'll especially need it if you intend to put it
together again. One thing I've learned in my 30 odd years, amateur and
professional, at working on bikes is; if available, get the manual.

Bill Smith

 

some very good points here (cam caps being engine specifc, take adjuster off
first, establish some kind of marking for aligning cams on re-assembly, and;
get a manual);

the original post was directed towards someone with a manual who would
happen to have the specs, and the where-with-all to advise someone without

am guessing the torque values on the cam caps to be in the 10# range; now if
i can just get away with using the old head gasket...

thanks!!

 

I happen to have the manual and the supplement for this bike. I wouldn't
mind looking up a particular torque value or something along those lines.
What I won't do is handhold someone through the entire process, because
it would be time consuming to type it out, and you won't be getting all
the applicable procedures, which are scattered throughout the manual
sections and also in the supplement for the later model variants.

You *need* to buy the manuals before taking the cylinder head off, trust
me. This is by far the best advice you are going to get. Going at this
sort of work without a manual is idiocy.

I bought the manuals from http://www.ronayers.com, they are pretty good
on price:

Part Number: 99924-1066-01
Description: Service Manual EX250E
Price: $28.82

Part Number: 99924-1109-60
Description: Service Manual Supplement EX250
Price: $19.46

 

buy the manual, or steal it.
there's nothing tricky about the job but screw it up and you'll wish you had
bought the manual.
the 250 ninja is a sweet little bike. i enjoyed mine.
my ninjas came in baskets. worked out well.
good luck, sammm

 

yeah; well to get the head into the shop (my first ninja 250 has me thousand
out of pocket only to find that it is on the verge of sucking the #1
intake), i'm hoping the online parts diagram will be enough (for example,
wouldn't want to make the mistake of not taking the complete tensioner off
as an assemby)

 

well had little trouble using common mechanical practice on the tear down;
now need the expected torque values and sequence for putting the cams & head
back on.

 

okay, well went with about 25 #'s on head torque, cold; couldn't make
heads/tails out of how in the world you would torque it warm (i see now
somewhere between 1.2 to 2 kg m); and am still guessing as to the cam caps.

found a pretty cool site ( http://www.ninja250.com ) , but have never seen
cams settings based on other than marks or pointing directly each other

 

try not to mix up the bolts. some are different lengths. the basket cases i
restored had stripped threads from the
mixup.
good luck, samm