My yamaha moto4 89' ymf 250 quad bike slips low

Brad Hurt

• 36 Answers

SOURCE: clutch pulling

Your clutch is not fully disengaging.Adjust the cable at the lever until you have plenty of free play.Then adjust the cable at the motor until you have full engagement then readjust lever to 3/8 in play.Fine tune at the motor.It may take a few trys but you can get it.

Posted on Feb 12, 2009

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.

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Posted on Apr 08, 2009

SOURCE: headlight 1972 yamaha 250 yz

You can add a headlight if the type of ignition system on your particular model is the type that will let you. Several different systems were used back then. The proper system will need a lighting coil installed onto the plate underneath the flywheel. The flywheel must be pulled off. You will see a coil there already for the spark. An unused set of threaded screw holes is present, (the same plate was used on the bikes that had a headlight). Just add the coil and now you have power for a headlight.

Posted on May 05, 2009

SOURCE: While pulling out from a stop, the engine seems to rev. It's like the bike is slipping out of gear or the clutch is slipping. The bike has 53,000 miles on it now.

There are two clutch adjustments you can make. The easiest is under the rubber boot on your clutch cable, adjust that so you only have about an eigth of an inch of play on the lever. If that doesn't fix it the next adjustment is under the ball and ramp, lossen the clutch cable completely, remove the derby cover, disconnect the clutch cable from the ball and ramp then remove ball and ramp. You should now see a post with a slot in it, take a screw driver and snug it down then back it off about a quarter turn. Now just reassemble everything. If you still have the slipping problem you need a new clutch basket.

Posted on May 28, 2009

SOURCE: yz 250 2008 possible 5th gear stripped, or shifting fork bent?

Do an oil change. If the gear were stripped there will be lots of metal particles in the oil. More than likely the fork is slightly bent such that the slider for fifth gear is just barely engaging. Put pressure on it by increased throttle and it pops out.

Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock.
www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx

Click on "Transmission"

Posted on Jun 01, 2009