Question about 2001 Yamaha FZX 750 (Not in Europe)

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Engine rebuild anyone out there know where to get step by step instructions on an engine teardown? im going to replace the crank, bearings, and piston.

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  • adimit Apr 29, 2009

    the firing order of the motocycle and its camshaft replacement

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Send a message to JUNIOR hes the resident gearhead tot heforum btw

Posted on Nov 10, 2008

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6ya6ya
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How to fix knocking main bearing of ct 100 bajaj


Hi, Gilbert for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. If necessary transport your vehicle to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your issue. For more information about your issue please visit the website below. Good luck and have a nice day.
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Aug 01, 2013 | Bajaj CT 100 Motorcycles

1 Answer

I need to find a diagram of the engine, piece by piece, to put back together for a yamaha 2003 125cc 4 stroke engine.


The best thing for you to do is to go to your nearest Yammy Dealer and buy a good manual specific for that bike/engine. If there is no dealer near you, you could order one by phone from a dealer.

There are going to be a good many adjustments, and procedures, and tolerances that you will need to know, plus some special tools, and all of that will be in the manual. It will have complete engine, and chassis breakdown pics, and all procedures for complete teardown and rebuild.

The chances of you finding all you need to know online are pretty slim, and you will need a manual later, anyway, just to properly perform the maintenance on the bike/engine.

Jun 23, 2011 | Yamaha YZ 125 Motorcycles

1 Answer

Beta Trials bike 250 cc replace crank and con rod bearings instructions, with torque values for all bolting?


Hi Kieranrobbins, I am sorry you can't find the first and best tool you ever bought for your Beta but despair not for a mere $0 you can download another one. For more information about your issue, please visit the websites below. Good luck and have a nice day.
HOW TO REBUILD Bike Engine 250cc
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Oct 14, 2010 | Beta RR 250 Motorcycles

1 Answer

Need rings!! for 1976 kawasaki ke 125


It looks like Babbitt's has the parts. Pistons and rings are sold in 3 sizes; standard, .020 oversize and .040 oversize. I would suggest you have the cylinder bored and install new piston, rings and needle bearing.
Go to www.babbittsonline.com/pages/parts/viewbybrand/default.aspx
You might want to install new crank bearings and seals as well but that involves an engine teardown. Please rate my answer. Thanks.

Aug 04, 2010 | 1976 kawasaki KE 125

1 Answer

1993 honda xr 125 runs strong but noticed metal shavings in oil whats the problem


Metal shavings in the oil indicate a pretty serious problem. Where the metal is coming from is the question. Unfourtunately, if the problem is not located inside the right side engine cover where the clutch is, the motor must be torn completely down in order to find it. The more you ride the bike, the bigger the problem is going to get. The bigger the problem, the more it will cost to fix it. I would not hesitate to tear down the engine. The shavings are now in the crank bearings, clutch plates, top end and everywhere else. The inside of the engine will need to be cleaned out. The only way to do it is a complete teardown. The good thing is that while torn down you can install new crank bearings, output shaft bearings, OHC chain and tensioner, and all new seals. You will end up with a nearly new engine.

Jul 22, 2010 | 2003 Honda XR 125 L

1 Answer

HI, I HAVE A HONDA CB125 TDE SUPERDREAM 87, BIG END LOOSE


I think honda only sells the complete crank as you have been told.
An expert engine machinist may be able to dissasemble the crank rebuild the journals, grind, source oversize\undersize bearings, refit bearings, reassemble and balance, but the time and cost would be more than a crank.
You may chase a second hand one from a bike breaker, personally I would try to find another motor, as if the big end has gone, there will be wear in other areas of the motor, like the cam bearings which also are not replaceable. It must have had an oil problem..

Jun 19, 2010 | 2001 Honda CB 125 T

1 Answer

Squeak from the right side of engine, while in gear at high rpm


hhhmmm,
Being the front of the motor may make this suggestion a bit silly.... I have heard of this sort of problem before and it turned out to be air sucked through the throttle butterfly plate bushing. Happens only when certain vacuum is present and the throttle plate is in a particular position,revs at a certain point etc. Check for wear in the bushing. They can be re bushed, or get another carby for it. Check also that you dont have any intake manifold leaks. Use carby cleaner about the manifold,quick spray and the revs change means that you have an air leak, could cause a whistle/squeak noise also. Hard to find these sots of things. I could suggest having a fiddle with the throttle shaft when the noise occurs, to see if you can isolate it better.
Seeing that it comes from the front of the motor, check all your exhaust for good seal also. With a bit of back pressure, it may be a leaky exhaust up front. Bit of a worry that it keeps chopping up bearings. What oil mix are you using? I doubt that it is engine internals. Unless something is very wrong. May also be a water pump if my other suggestions wrong. If it relates just to revs, then sounds like a bearing... maybe waterpump. If it stops when you roll the throttle off keeping the same revs, i reckon intake or exhaust leak. Let me know what you find. Cheers
regards robotek

Apr 15, 2010 | 2005 kawasaki KX 250

1 Answer

Bad bearings i need the best way to teardown


Before you go down this road ,remember that you will neen specilist tools and the parts are not that cheep .if you have a workshop manual read up on the work and knowledege and information needed to attempt an engine strip down and rebuild .

Mar 14, 2010 | 1984 Honda VT 500 C Shadow

2 Answers

I need to know how to dis/reassemble a 1974 DT 360?


A service manual ( if you can find one ) is what you need. The second thing you need is repair parts. They are pretty hard to find. Babbitt's, a well known distributor, only has parts left in stock for the top end. Go to their website, www.babbittsonline.com/parts/viewbybrand/parts.aspx
and you can see what is left. There's also a diagram of the crankcase center halves. If you can't get the repair parts, spending hours doing an engine teardown is fruitless.

The teardown will require a flywheel puller, a case splitter, an impact driver, and a torque wrench (somewhat optional). Disassemble the top end then remove the left and right side case covers. Remove the flywheel and related electrics, the clutch, crankshaft drive gear, oil pump, kick starter, shift shaft assembly, shift drum end cap and index pins. Now remove the screws on the center case and you can then split the case. This gives you access to replace shift forks, gears, and bearings. Note that crank seals can be replaced without splitting the case.

I am not trying to be a smart *** here, but re-assembly is just the reverse of dis-assembly. This is why a manual would help. Another potential source for parts is to Google motorcycle salvage yamaha .
The normal things you would need to replace inside the center case would be bent shift forks (if shifting is the problem), busted gears, crank bearings and seals, and sprocket shaft bearing and seal. All else can be replaced by removing just the side covers.

Dec 10, 2009 | 1974 Yamaha DT 360

3 Answers

Crank case overflow is pulling oil out of motor and into airbox


It almost sounds like a ring is broken and you are looking at a motor teardown if you have excessive suction in the crankcase.
Ken S.

Mar 23, 2009 | 2005 Honda CRF 450 R

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