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Valve clearence for 250cc bikes - 2008 KTM 450 SX-F

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Found this bike rotting and I'm fixing it up. Can anyone please help me identify the model? First I thought it was the XR250 but the engine block looks a little small for a 250cc. Electric start.


The Honda XR 200R had a 195 cc (11.9 cu in) engine that was shared with the Honda ATC 200x but with a different camshaft and carburetor. This engine ran 10:1 compression ratio and was over square. For the 1984-85 model years, the XR200 had a smaller version of the same 4 valve RFVC engine as the other XR's in the line up. The 200cc RFVC engine shared many parts with the 250cc RFVC engine. For the 1986 model year, Honda reverted to the 2 valve engine that had powered the XR200R before 1984 and variations of the 2 valve engine continued to power the XR200R until the model was dropped altogether.

Jun 08, 2017 | Motorcycles

1 Answer

What is a tappet on my Apollo DB 125cc pit bike


Hi, Cory it's the arm that the camshaft moves to open and close the valves for more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
how to set valves on pitbike
Pitbike Direct How to adjust your tappets
http://mypitbike.ru/downloads/OrionAssemblyInstructions.pdf
2 Apollo Dirt Bike Reviews Youll Want to Read
125cc pit bike carby service


Mar 19, 2016 | Apollo Orion 250cc Pit Dirt Bikes Pro

1 Answer

Bike runs but when gets warm shuts down will start in about 15 mins when cools


Valve clearence is to tight, compression then becomes zero when hot and when cooled down again compression is back. Adjust clearence maybe 0.05 mm more up, but check all valves an all cylinders.
You could have a burnt seat too.

Aug 05, 2014 | 1984 Suzuki Gs 550 L

1 Answer

How do I adjust ZZR1400 valve clearence


The valve lash adjustments on these bikes are done with shims on a COLD engine.
Intake valves 0.15-0.20
Exhaust valves 0.22-.0.27
Check the specs on your emissions sticker to confirm...California bikes are subject to change.
If you are not familiar with timing marks and adjustment procedures, i recommend you buy the manual and follow the steps outlined, the illustrations are also a big help.
Good luck, i hope this helps.

Jul 17, 2011 | 2008 kawasaki ZZR1400

1 Answer

My kl250 will not start even after valve adjustment


hi, are you saying since you addjusted the valve clearences the bike wont start? re check make sure you had the engine on the correct stroke, remove spark plug, check piston is at tdc, and the cam lobes are facing down, recheck your clearences here, hope this helps/paul

Dec 30, 2010 | 2003 kawasaki KLR 250

1 Answer

Valve clearences specs for XT600 1990


Valve Clearance Cold - Inlet : 0.07 -
0.12 mm
Valve Clearance Cold - Exhaust : 0.12 - 0.17mm http://www.motorbikespecs.net/index.dyn?flag=2&model_id=2147939&make=Yamaha

This site gives most tech. details required for your bike. Cheers.

Apr 29, 2010 | 1990 Yamaha XT 600 E

3 Answers

What is meant by ' Valve clearence ' ,How to adjust it.


"Valve Clearance" refers to the small gap between the valve lifter and the valve stem that allows the valve to completely close. Remove the Valve Cover and set the crankshaft to the timing marks (only found in your service manual), for each particular valve to be completely closed. Loosen lock nut and set with a feeler guage then retighten the locking nut on the adjustment shaft. Four valves = four adjustments. Does this help?

Jul 02, 2009 | 2008 Yamaha Gladiator SS

1 Answer

How do you inspect valve clearence and adjust the valves???


you use a set of feeler guages to measure the gap between the valve and the tappet (the arm that opens the valve) there is a intake and exhaust gap setting. you'll have to do some research to find out what the gap should be for your motor.

Apr 18, 2009 | 2004 Suzuki GZ 250 Marauder

2 Answers

2005 Honda crf450x cold starting


doulbe check the grounds, & you might need to add and extra ground wire to the bike, closer to the starter. This should help. There is a valve that release the compression when you kick it off.You might see if you can pull this release the compression valve while pushing the start button????

Feb 07, 2009 | 2005 Honda CRF 450 X

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