Question about Yamaha YZ 250 Motorcycles

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How do you install torsion spring for power valve on a 1996 yz 250r

Just bought the bike needs installation of tosion spring on power valve how do i install it

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  • Yamaha Master
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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Yz 250 power valve spring tension part 2
96 yz250 powervalve adjustment
YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Posted on Jul 27, 2016

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Posted on Jan 02, 2017

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SOURCE: yz 250 2008 possible 5th gear stripped?

I doubt that any gears are stripped. Believe me you would have known it when it happened at 40mph which is where you would have to be in 5th gear. This is a bent shift fork. The actual gear is fine. The slider gear is not moving far enough to engage with 5th gear. The YZ does tend to have this problem in 5th and 1st. "Dirt rider Magazine " did a story on it. Best to let the shop do the repair as the entire motor gets torn down into about 100 parts.

Please rate this solution. Thanks!

Posted on Apr 08, 2009

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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Hi, Anonymous and the usual suspects are:
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2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


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INSTALLING TORSION SPRING & VALVE DOOR ASSY.


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God bless you

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Hi, Anonymous and the usual suspects are:
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For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e



Feb 25, 2012 | Yamaha YZ 250 Motorcycles

1 Answer

How difficult is it to replace valves in a 85 Toyota Pickup?


It can be done, but it is classified under the engine overhaul reconditioning, which can be time consuming and expensive for an engine machinist to do. To do it yourself is not usually recommended.--- REMOVAL & INSTALLATION A valve spring compressor is needed to remove the valves and springs; these are available at most auto parts and auto tool shops. A small magnet is very helpful for removing the keepers and spring seats. Set the head on its side on the bench. Install the spring compressor so that the fixed side of the tool is flat against the valve head in the combustion chamber, and the screw side is against the retainer. Slowly turn the screw in towards the head, compressing the spring. As the spring compresses, the keepers will be revealed; pick them off of the valve stem with the magnet as they are easily fumbled and lost. When the keepers are removed, back the screw out and remove the retainers and springs. Remove the compressor and pull the valves out of the head from the other side. Remove the valve seals by hand and remove the spring seats with the magnet. Fig. 1: After compressing the valve spring, be careful removing the keepers--they are easily fumbled 85783113.gif
Fig. 2: Always install new valve stem seals 85783114.gif
Fig. 3: Lightly tap each assembled valve stem to ensure correct fit of the keepers, retainer and seals 85783115.gif
Fig. 4: Special tool to remove the valve spring--you also need tool to hold valve up 85783273.jpg
Fig. 5: Removing the keepers with a magnet 85783274.jpg
Fig. 6: Removing the valve spring 85783275.jpg
Fig. 7: Removing the valve seal 85783276.jpg
Fig. 8: Installing the valve seal 85783277.jpg
Since it is very important that each valve and its spring, retainer, spring seat and keepers is reassembled in its original location, you must keep these parts in order. The best way to do this to cut either eight (four cylinder) or twelve (six cylinder) holes in a piece of heavy cardboard or wood. Label each hole with the cylinder number and either IN EXp>After lapping each valve into its seat (see Valve Lapping below), oil each valve stem, and install each valve into the head in the reverse order of removal, so that all parts except the keepers are assembled on the stem. Always use new valve stem seals. Install the spring compressor, and compress the retainer and spring until the keeper groove on the valve stem is fully revealed. Coat the groove with a wipe of grease (to hold the keepers until the retainer is released) and install both keepers, wide end up. Slowly back the screw of the compressor out until the spring retainer covers the keepers. Remove the tool. Lightly tap the end of each valve stem with a rubber hammer to ensure proper fit of the retainers and keepers. prev.gif next.gif

Dec 19, 2010 | 1985 Toyota Pickup

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