1979 klx250 engine rebuild - Page 2

Th3-di3ing-br33d · 08-13-2008, 07:42 PM

is it a klx250r engine right. ill keep looking that was just from hinson they only showed years 1994-1997 clutch baskets being ava.

turtlemann14 · 08-13-2008, 07:48 PM

i don't know about the r...
it a a1 model

turtlemann14 · 08-13-2008, 07:52 PM

so, my rings where a little loose... the oil rings just dropped
to the bottom of the cylinder

the piston has a .022" taper
the top is smallest

Hardtail · 08-15-2008, 06:15 PM

Liken the pics!!!
Have fun!!!(you don't need luck!)

turtlemann14 · 08-15-2008, 07:22 PM

pshit who says i don't lol

have more on the way...
got the exhaust port polished as much as i can

got the valves out, with out a valve compressor

but i can't get them in the same way

the guides need replaced, intake is the worst
the exhaust valve had something(not carbon or oil) caked on it about a 1/4" thick
the valve seat is convex and the surface on the valve is concave(need reseated if not replaced)
rockers are good to go so is the cam
the slipper for the timing chain was not worn horribly in face one had no wear on it

um... i think thats it for now

turtlemann14 · 09-09-2008, 06:31 PM

ok, so i was wrong... my shop teacher said my valves and valve guids are still good
although the seats needed lapped very badly
i cut them and ground them seat = 44* and valve = 45*

made a puller to take the fly wheel off, worked like a charm

the timing chain ate in to my case and in to the plate that holds the stator coils but its nothing i still can't use

the sprocket on the crank shaft has two sides so i am going to try and turn it around (no need to by new crank sprocket)
the timing mark on the sprocket is set off to the left side of the keyway on the flywheel and i am wondering if it is off time.... it does not look like it has a key-way in it so it would e possible for it to un-time after a while

i am measuring the cylinder and something is very not right... is measures out to about 69.99mm and its supposed to be a 70mm bore
how could that be possible?

umm... i think thats it for now, i am ordering parts as soon is i figure out whats going on with the bore

what would happen if you where to restack the clutch plates so that they would run on the ridges of all the grooves? (making it ware back to a flat surface)

pic asap

tjscott2012 · 09-09-2008, 08:28 PM

whatdaya mean turtle? im pretty sure bores are always smaller than they are advertised. like the ktm 505 is actually a 4 something

wr250f95 · 09-09-2008, 09:32 PM

ktm is the only one that dramtically over states engine size, even then it doesnt matter because its just a model number.

cool turtle, I look forward to the pics!

jc--07 · 09-10-2008, 04:10 AM

finaly more engin pics

turtlemann14 · 09-10-2008, 04:25 PM

the bore is supposed to be 70mm and the stroke is supposed to be 64mm

not cc i know that its lower than the model number

bore and stoke should be exact

any comments on the timing chain or do i need to take it to the kawi shop?

08-13-2008, 07:42 PM	#11 (permalink)
Th3-di3ing-br33d Pro Mototips Member Join Date: Aug 2007 Location: The Valley, Ohio Posts: 1,390 iTrader: (0)	is it a klx250r engine right. ill keep looking that was just from hinson they only showed years 1994-1997 clutch baskets being ava. __________________ 01 yz 125 District 11 racing http://www.district11ama.com/ http://www.fasttraxxracing.com/ sponsers for 09. THANKS Bo's Radical Racers Moose Racing Boyesen Racing products SIXSIXONE CYCRA racing

08-13-2008, 07:48 PM	#12 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,986 iTrader: (0)	i don't know about the r... it a a1 model __________________ If it does not move at first, get a bigger hammer!! Myspace Yamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

08-13-2008, 07:52 PM	#13 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,986 iTrader: (0)	so, my rings where a little loose... the oil rings just dropped to the bottom of the cylinder the piston has a .022" taper the top is smallest __________________ If it does not move at first, get a bigger hammer!! Myspace Yamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008 Last edited by turtlemann14; 08-13-2008 at 07:57 PM.

08-15-2008, 06:15 PM	#14 (permalink)
Hardtail Pro Mototips Member Join Date: Dec 2006 Location: Southeast V.A. Posts: 1,861 iTrader: (1)	Liken the pics!!! Have fun!!!(you don't need luck!) __________________ I love the smell of gasoline!! I woke up.....life is good!!!

08-15-2008, 07:22 PM	#15 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,986 iTrader: (0)	pshit who says i don't lol have more on the way... got the exhaust port polished as much as i can got the valves out, with out a valve compressor but i can't get them in the same way the guides need replaced, intake is the worst the exhaust valve had something(not carbon or oil) caked on it about a 1/4" thick the valve seat is convex and the surface on the valve is concave(need reseated if not replaced) rockers are good to go so is the cam the slipper for the timing chain was not worn horribly in face one had no wear on it um... i think thats it for now __________________ If it does not move at first, get a bigger hammer!! Myspace Yamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

09-09-2008, 06:31 PM	#16 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,986 iTrader: (0)	ok, so i was wrong... my shop teacher said my valves and valve guids are still good although the seats needed lapped very badly i cut them and ground them seat = 44* and valve = 45* made a puller to take the fly wheel off, worked like a charm the timing chain ate in to my case and in to the plate that holds the stator coils but its nothing i still can't use the sprocket on the crank shaft has two sides so i am going to try and turn it around (no need to by new crank sprocket) the timing mark on the sprocket is set off to the left side of the keyway on the flywheel and i am wondering if it is off time.... it does not look like it has a key-way in it so it would e possible for it to un-time after a while i am measuring the cylinder and something is very not right... is measures out to about 69.99mm and its supposed to be a 70mm bore how could that be possible? umm... i think thats it for now, i am ordering parts as soon is i figure out whats going on with the bore what would happen if you where to restack the clutch plates so that they would run on the ridges of all the grooves? (making it ware back to a flat surface) pic asap __________________ If it does not move at first, get a bigger hammer!! Myspace Yamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

09-09-2008, 08:28 PM	#17 (permalink)
tjscott2012 The Spam man Join Date: Nov 2007 Location: Hurley, Mo Posts: 4,864 iTrader: (0)	whatdaya mean turtle? im pretty sure bores are always smaller than they are advertised. like the ktm 505 is actually a 4 something __________________ 87 Banshee Red Frame, Black plastics. bone stock (for now) -Life is full of ups and downs, so I say, get a quad and jump those mother****ers

09-09-2008, 09:32 PM	#18 (permalink)
wr250f95 Super Moderator Join Date: May 2007 Location: New Mexico Posts: 7,827 iTrader: (1)	ktm is the only one that dramtically over states engine size, even then it doesnt matter because its just a model number. cool turtle, I look forward to the pics! __________________ "LIFE'S JOURNEY IS NOT TO ARRIVE AT THE GRAVE SAFELY IN A WELL PRESERVED BODY, BUT RATHER TO SKID IN SIDEWAYS, TOTALLY WORN OUT, SHOUTING'...HOLY S**T... WHAT A RIDE!" this, is why I ride.

09-10-2008, 04:10 AM	#19 (permalink)
jc--07 A Rider Join Date: Aug 2008 Location: Edinburgh Posts: 602 iTrader: (0)	finaly more engin pics __________________ bikes are gooooooood

09-10-2008, 04:25 PM	#20 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,986 iTrader: (0)	the bore is supposed to be 70mm and the stroke is supposed to be 64mm not cc i know that its lower than the model number bore and stoke should be exact any comments on the timing chain or do i need to take it to the kawi shop? __________________ If it does not move at first, get a bigger hammer!! Myspace Yamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

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