re-jetted my bike

Jerry G Turner · September 19, 2009, 05:24:07 PM

Today I decided to re-jet my bike to eliminate the med range hesitation I have a K&N filter and have drilled holes in the pipes I went with #42 slow jets and #105 mains added 1 shim and adjusted the fuel air screws 2&3/4 turns it runs great now no hesitation at all. I will say this though I will not do it by myself again, at the wrench sessions it usually takes us about 2 or 3 hours it took me a little over 6 hours to do it by myself and it wasn't nearly as much fun. Had a hard time getting the carbs off and a harder time getting them back on but I did get it done.

Damn Yankee · September 19, 2009, 05:44:07 PM

You're a better man than I, Gunga Din...I pulled the air filter housing, saw those four brass horns staring up at me and what it took to remove them and I suddenly began to molt....

Chad in Michigan · September 19, 2009, 06:53:14 PM

if you want some help, just holler. i can come out to help you if you want

i've had mine on.off at least 10 times within the last 2 years and have experimented wih various jetting.

hootmon · September 19, 2009, 09:37:22 PM

Not to Hi-jack the tread, but I have a carb question..
I have K&N and a hole drilled in each exhaust. I have one added shim.
My bike has always had a bad stumble in the low end and not the mid range. I almost always have to choke my bike when I start it even here in Florida, during the summer..
Between 4K and Redline the bike pulls strong...
Should I up my Idle jets?? They are stock now, any recommendations on what I should go with and where to get them..
Before I change jets, should I turn my idle mixture screws out some more to see if it helps?? anybody have a suggestion for the number of turns out I should shoot for??

Thanx for the advice in advance.

TLRam1 · September 19, 2009, 09:47:14 PM

Hoot, I would do what Jerry did and turn them out 2 3/4 turns before you do jets, also do you have any extra shims in the carbs, I would add 1 shim to each needle.

hootmon · September 20, 2009, 05:58:19 AM

Quote from: hootmon on September 19, 2009, 09:37:22 PM
I have one added shim.

Before I change jets, should I turn my idle mixture screws out some more to see if it helps?? anybody have a suggestion for the number of turns out I should shoot for??

Thanx for the advice in advance.

Shims - See above. - I did not see any improvement on the low end stumble from the shim addition. My gas mileage seems to have gone up, but nothing on the stumble.

2 3/4 turns.. - Great.. I have the bit needed, but I'd rather go with number of turns than try to adjust them while the engine is HOT..

I'll give it a try!!!

Greg Cothern · September 20, 2009, 09:29:29 AM

I think Jerry's combination is a VERY good choice. Hootmon, I also think it would be about right for you also.

Damn Yankee there is NO need to remove the 4 trumpets, leave them attached.

Remember you guys can always give me a shout if you need help in the DFW area.

hootmon · September 20, 2009, 10:10:06 AM

Is DD the best place to get jets from ??

TLRam1 · September 20, 2009, 11:35:55 AM

Quote from: hootmon on September 20, 2009, 10:10:06 AM
Is DD the best place to get jets from ??

I would say it is one among many, no problem supporting one who supports us but with your budget situation I know cost is utmost importance so once you factor in shipping you might do better somewhere local.

hootmon · September 20, 2009, 12:12:47 PM

Are there brands I should consider and brands I should avoid??

Jerry G Turner · September 20, 2009, 07:18:53 PM

I got mine at jetsrus.com fairly reasonable prices

BA · September 22, 2009, 12:27:20 AM

Chad helped me rejet mine early last summer and it is running good. I have the K&N filter and two 7/16" holes drilled in each pipe. We went with the 105 main jets, 2 extra shims (3 total) per needle, and 2-3/4 turns out on the d-screws. I get a lot of popping on decel, so I think the idle jets may need to be bigger. I'm taking a dyno operators class this fall and will be dyno tuning my Magna sometime in October

. I'll let you know where I end up. The instructor told me to get a dynojet kit (he's a Harley guy), but I plan to check valve clearance and sync the carbs, then baseline it and adjust the A/F mixture before buying anything (and I don't plan to ever get the dynojet kit).

Jerry G Turner · September 22, 2009, 04:27:38 AM

with the 42 idle jets I have almost no decele popping.

TLRam1 · September 22, 2009, 08:53:56 AM

Keep us in the loop on your A/F mixture when you dyno.

Jumbobret · September 22, 2009, 02:47:09 PM

Jerry, next time you need or want some help, let me know I live in Arlington as well. I'm about four miles north of Two Wheel World. Will be glad to help.