Predator 90
Won't rev with rear wheels on the ground,lift it up and it revs up fine. Just did a lot of work to it,last owner neglected everything. He did a lot of water and mud hole splashing thru riding. Replaced air filter and repaired box,it wasn't even holding the filter in place or sealing.
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Would help to know what all you've done,but one thing I'd do is replace the air box to make sure it's sealing good rather than repair one. They're cheap ($18.50) and include a new filter.https://www.ebay.com/itm/NEW-Air-Fil...5WmArN&vxp=mtr
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I replaced rear end bearings,drive shaft bearings and seals,all brakes and tiered ends. I just installed screws that hold the filter housing together,it only had 1 in it and wasn't sealing at all. The housing and elbow goin to carb were caked with dirt , even in the clean side. It ran ok before . Is there only 2 adj screws on carb,idle and the 1 that is at an angle?
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Originally Posted by Yamahaulinass
(Post 3377429)
Is there only 2 adj screws on carb,idle and the 1 that is at an angle?
AIR SCREW ADJUSTMENT 1. Turn carburetor air screw in (clockwise) until lightly seated. Back screw out the specified number of turns. Air Screw Adjustment 1.5 turns out Warm up the engine to operating temperature (about 10 minutes). 3. Set idle speed to 600 RPM. NOTE: Adjusting the air screw may affect idle speed. Always check throttle cable freeplay after adjusting idle speed and adjust if necessary. 4. Turn the screw in (to richen) or out (to lean) the mixture. Adjust air screw for best throttle response and smooth idle. 5. Re-adjust idle speed if necessary. Wouldn't hurt to make sure compression is at least 115 psi also. Plus there are a few videos you can check out on youtube. |
Thank you. I goofed when I asked ? in 2 places. I don't have the process of posting and replying down yet. I'm pretty green to website stuff.
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More details
If it had gears,it acts like it has a hi gear only,roll it down the driveway a bit and it goes fast and revs hi until u start to climb up grade
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1 Attachment(s)
Sounds like you need to check into the belt and clutches. Could be as simple as a worn/stretched belt or clutch parts need replacing.
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The 90 lives!
the belt and pulleys needed cleaned a lot more,it was a greasy mess in that whole housing when I started. It goes fine now. These things are peppy. It would whip our trx 90, and it has a pipe and good air cleaner
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:thumbsup: Yes when you get them running right these little 2 strokes will out run a lot of the smaller 4 strokes.
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