[blind180]

Great site, just found it. My 13 year old son is riding / racing a 07 150R Expert in Supermini. We recently put a Boyeson quick shot and msr fuel screw on it, other than gearing and suspension work the bike is like stock. I put the quick shot on my 250F and wow! He noticed more snap on the 150 but we discovered someting tonight at practice, off the gate starting in 2nd like he always has there is a noticeable bog. He does not over rev the bike ( thank god) like alot of kids coming off 2 strokes but his starts are not going as good as prior, i worked the gate tonight and could here it. i asked him if he was in 3rd, he said no it was bogging. The fuel screw is set at stock range (2-2.5), i don't have the jetting handy but the bike was bought from a shop that dyno tested it and had made changes from stock for our climate / region because the stock did not work well. The bike is awesome and runs great. The only problem we have had is that if he goes down while racing it is a bear to start no matter what you do and the current issue of bogging leaving the gate....sorry for the rambling. we have had the recall and valves recently checked.
- Any suggestion on the fuel screw or jetting, we are in florida with all the heat and humidity?
- can someone provide more detail on wiring the ap and throtle cables together as i heard this is a must?

Thanks again....great site!!!!

[Asmith]

AP Mod e-mailed to you. It is for the 450 but the carbs are the same just smaller.

[blind180]

wow! Thanks for the quick reply, i hope you are enjoying a cold one as i am on a friday night after track time! i'll get to the mod tomm. and let you know how it works out.
Thanks again

[Asmith]

Let us know if you need help...

AS

[blind180]

Thanks for great info, we did part one and he rode today. Huge diff. in throttle response even more than when we put on quickshot. Could not gate today so we don't know for sure, but he said he took off hard and it did not hesitate at all!
We are ot sure yet on the hard start after a dump. we had a good practice. What has happened is in race mode if he goes down, it takes 10-20 kicks. I have laid the bike down and had him pick it up to refire to watch if he is doing something odd and can't see anything. Has any one expirienced hard starts after a fall? I know it is race mode and maybe he is panicked somewhat, but maybe there is a secret someone has found that works all the time?
Thanks again for all the help!!! i'll do my 250F next.

[dntsdad]

hate to butt into this thread but can i get a cop of that info as well please.

[email protected]

[crfsonly]

the bog and hard starting are really two different problems. one is jetting and one is accelerator pump. the stock jetting on this bike is HORRIBLE in nearly all situations. get the jd jetting kit and be done with the hard starting. this will also give you better throttle response as well as more power throughout.

ken

[mikey526]

For the hard starting when it's hot, I usually shift it into neutral. Even though that takes a little time in the race, my 150 always seems to start better when it is in neutral.

[captfad]

hi guys my sons has the same problem could i get a copy of it . We have put a quickshot on it and a white bros carb kit wired the ap and throttle starts easier but has still got bottom end bog, makes no different it low speed is out 1 and half or 3 and a half turns please help as he has the Aussie titles in 4 weeks
thanks

[Asmith]

hi guys my sons has the same problem could i get a copy of it .

Sent via e-mail...

[captfad]

thanks for the copy much appreciated

[kirkn8r]

I'd like a copy of the AP Cam to throttle cam mod too please.
My son has totally stock CRF150R, what jetting and carby setting for the Northern Territory, Australia? Usually humid and hot for 6 months of year (avg 40 degress C) the other six months drier and a littl cooler (avg 30 - 35 degrees C).

We are roughly 180 - 200 mt above sea level but 300 kms from the coast.

All help appreciated.
[email protected]

[rhino1995]

Hey ~ - I have the same problem on both my kid's 150Rs - can /i get a copy as well please.

[email protected]

Much appreciated

[Asmith]

Hey ~ - I have the same problem on both my kid's 150Rs - can /i get a copy as well please.

[email protected]

Much appreciated

Done!

And Welcome to the site!!!

[shspvr]

blind180 this best solution to get for any CRF150R
James Dean Jet Kit
R & D Racing Power Bowl & Power Spring & Extended Fuel Screw.
Here why
Easy Tune Leak Jet (ALJ)
Bolt-on Power
Easier Starting
Instant Throttle Response
Improved Acceleration
Eliminates Hesitation and Bogging
Better Holeshots
Reduces Hot Engine Stalling