1998 king quad 300 exhaust manifold glowing red

[goatman]

checked stator, coil pick up and coil they all checked out just fine

taking off in high it feels like it wants to lift the front tires off the ground

its a 1998/27 year old machine, im just going to call it good enough.

thanks for your help

[Gwbarm]

Im so glad it worked out. Good job! 

[Mech]

Try turning the heaadlights on and see if it revs better. And check the charging and regulating. That can make them sound like a rev limiter but usually at much lower revs.

[goatman]

the head lights are not hooked up right now, at idle it would show 13.5v and when revved the volts would drop to 13.1v. coil pick up was 120 ohms(100 to 200), the 3 yellow wires 0.6 ohms (0.1 to 1.0). ignition coil primary resistance was 0.5 ohms and secondary was 19,800 ohms (12,000 to 20,000) i was going to have a good look at the jet needle to see if there is a number on it and to move the clip to different positions

[goatman]

it has the right 5d40 jet needle. the jet needle has 5 grooves for the clip its supposed to be in the 4th groove but nothing says groove from top or groove from bottom, tried them all and its at the 2nd from top of carb or 4th groove from bottom. the battery was brand new when i tested the running voltage before so it was sucking some voltage topping up its charge. right now its 14v at motor hot idle and 13.7v under throttle. i think its supposed to have 160 psi compression and its at 110 psi, like i said im just going to be happy with how it is

[nduray3]

I’m kind of curious is the very top groove lean or very top rich

[nduray3]

Also are there any tools that will reach the pilot screw without tearing the carb out?

[Gwbarm]

The very top slot is the leanest allowing more of the needle to stick down in the carb restricting gas flow.

There is a tool to allow you to adjust carb without removing it.

 

https://www.amazon.com/Camrusic-Adjusting-Carburetor-Adjustment-Snowmobile/dp/B0BQ358K3G/ref=sr_1_6?crid=O7W6CERI8JBR&dib=eyJ2IjoiMSJ9.HbkL_KAKVnM04taEVyr7YO0rL62LGSTMtLAxot_nxf6dL9m3tyFt08og4xOtnB_T4FxZvSPOlSXfroAYW7k6TfPluqB7-exCAxI_mBy2DHsYQFn9QS4ZsazGC44ZNYq7rdTYQICR8qThGutnVsIHhsBg-7oRNq3IxfQjihPdNXG_0kC7uH0FvjjtPoUAE_QjcjQjLoDirXp9xc8CPrpFAfdy1HxUIKT6dkhc-Zl5RMWsC90CqDpTcSFfdbae8wV0Yfu1GOpb7b1A8uokMuqUIgiRjo1SnU61-_13W5mKnKQ.uKo7qioldLi4mXZ1d6S1ooDYssBBtlt2VJWsFGOu_tg&dib_tag=se&keywords=atv+carb+adjusting+screw&qid=1756405930&sprefix=atv+carrb+adjusting+screw%2Caps%2C133&sr=8-6

[nduray3]

Got that bad boy ordered I’ll try it out

Were you able to get it dialed in with that tool?

[goatman]

I wound up making a smaller air intake hole and kept trimming the hole larger until it wouldn't choke itself out and solved the problem