2022 1/2 Templar X

Thumper · 03-25-2023, 11:18 AM

I drilled out the pilot air mixture screw adjustment blockoff and reset to about 2 turns out. I had previously rejet to 42 on the pilot jet, so took others advice and thought 2 turns would be OK.

It was WAY too lean on mine. I closed the air mix to just under 1 turn and it starts/idles great now.

On the Keihin clone Youall smoothbore, this is an airscrew. Opening it adds more air to the mix. So closing it to 1 turn enriched the mixture.

The main clue was popping and backfiring. These are signs of lean mixture. I was thinking CDI or something!

It is HARD to get a screwdriver onto this. On mine it is right behind a frame stay. So I used this 4mm screwdriver bit on a short magnetized extension. This REALLY made adjustment easy:

03-25-2023, 11:18 AM	#10
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,237	I drilled out the pilot air mixture screw adjustment blockoff and reset to about 2 turns out. I had previously rejet to 42 on the pilot jet, so took others advice and thought 2 turns would be OK. It was WAY too lean on mine. I closed the air mix to just under 1 turn and it starts/idles great now. On the Keihin clone Youall smoothbore, this is an airscrew. Opening it adds more air to the mix. So closing it to 1 turn enriched the mixture. The main clue was popping and backfiring. These are signs of lean mixture. I was thinking CDI or something! It is HARD to get a screwdriver onto this. On mine it is right behind a frame stay. So I used this 4mm screwdriver bit on a short magnetized extension. This REALLY made adjustment easy: __________________ -2022 5 speed Templar X Orange, OEM 51T rear sprocket, 14T front sprocket -NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it Last edited by Thumper; 05-11-2023 at 05:58 PM.
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