still smokin'

[clutchcover]

Hi everyone.I have yet another jetting question. I rejetted my bike. I feel it is farly close to being on. I tried running a 155 main with a swiss cheesed airbox with no snorkel. I also dropped in a 45 pilot. It was 80 degrees almost no humidity at 4300 feet. The 155 was too lean without the snorkel, with it in it was ok. My question is,why when I open it up does it still smoke? It is crisp all the way through and is not running rich on the main. Without the snorkel in, it was way to lean, it bogged horribly. I plan to take out the snorkel and run the stock 160 so I have that extra umph. When I say it smokes, I mean quite a bit, but only where the main circuit comes in. Could it be due for a top end? The compression is there and it starts with a lazy weak kick almost everytime. The bike runs great and I haven't fouled a plug ever. It just puzzles me. Thanks in advance guys.

 

[jaguar]

What engine oil do you use and at what ratio?

 

[clutchcover]

Amsoil @32:1. I don't want to run 40:1. I can't convince myself there is enough lube. I may end up doing it though. I was under the impression that you could jet to the 32:1 and it wouldn't smoke. Any thoughts?

 

[agitt73]

smoke is normal unless you use smokless oil

 

[Chief]

I think Amsoil is great. According to experienced tuners here, using less oil is not the solution, so don't go lean on the oil. I agree with them. I use mobil full synthetic mx2t at 32:1. It smokes, but it's a 2 stroke. runs nicely and very little spooge. Smokes in all zones. 2 strokes are supposed to smoke. If I had time to re-jet and experiment now, I would be going richer on oil.

 

[davidg]

Have you tried leaving the 155 in and moving the clip on the needle. Moving it down will richen it up, the clip is more of a fine tune.

 

[clutchcover]

I did. It ran better the second clip from the bottom where it actually richened it. It still spooges somewhat, which worries me more than the smoke. It has slowed down considerably, but it is still there. I experimented a little more today. When I tried to lean things it was a little too much. It runs great, but the black polkadot fender is really getting to me.

 

[davidg]

I also get residue over the back of my fender. But just because you see the mx bikes w/o the residue doesn't mean it's not there. Rember the kdx's fender is larger and slopes down. Where a kx fender points straight out. I can deal with the "black pokadot" fender better then my friends kx 250. After every ride it has oil running down the muffler, it doesn't like the slow tight trails.