New main jet without a power kit? -CRF's Only Forums

jtcohenour · by **jtcohenour** » Fri May 18, 2007 11:56 am

Is it a bad idea to install a new #132 main jet without a power up kit? I have stock exhaust with the baffle removed, and a stock air filter with the snorkel removed.

Jethro · by **Jethro** » Fri May 18, 2007 1:11 pm

on my 2001 xr250r i changed the pilot jet only to like a 142 but it had no packing in the stock exaust and it made a night a day difference in throttle response and bottom end power. you might just have to play with a couple jets to find out what is to much with stock parts, but yes you can get some performance by just changing the pilot and main jets if you are broke like me and cannot spoil yourself 6 aftermarket kits a month like most riders nowadays

jtcohenour · by **jtcohenour** » Fri May 18, 2007 1:14 pm

Thanks for the tip. I am going to have to try a few. I would love aftermarket exhaust but just can't afford to part with the money to but it right now.

K D · by **K D** » Sat May 19, 2007 1:46 pm

A 120 main and a 45 pilot jet will work great with what you have. $\:D/$

jtcohenour · by **jtcohenour** » Mon May 21, 2007 10:29 am

So you think a 120 main would work better than a 132 with my setup?

K D · by **K D** » Mon May 21, 2007 4:41 pm

jtcohenour wrote:So you think a 120 main would work better than a 132 with my setup?

Yes I do.

jtcohenour · by **jtcohenour** » Tue May 22, 2007 8:29 am

should I wait to do the main jet until I can afford to do the power up kit also? Will doing the main jet alone damage the bike?

Jethro · by **Jethro** » Tue May 22, 2007 8:35 am

no , all you are doing is giving it a little more fuel.

jtcohenour · by **jtcohenour** » Tue May 22, 2007 12:08 pm

Istopped by the honda dealership today and picked up a #120 round main jet. I will install it ASAP and let you know how it runs.

jtcohenour · by **jtcohenour** » Tue May 22, 2007 4:57 pm

What a surprise. I pulled the "old" jet off this evening and to my surprise the bike already had a #132 installed. I just went ahead and re-installed it because the bike is running great with it. I wish I knew if the previous owner installed the powerup kit also. Does anyone know a surefire way to tell if its installed?

Asmith · by **Asmith** » Tue May 22, 2007 5:00 pm

jtcohenour wrote: Does anyone know a surefire way to tell if its installed?

Yep. Take out the jet and see if it says #132 on it...

jtcohenour · by **jtcohenour** » Wed May 23, 2007 7:19 am

The jet is definately a #132 I wonder if when the previous owner installed the new jet if he also installed the power up kit.

Asmith · by **Asmith** » Wed May 23, 2007 7:21 am

jtcohenour wrote:The jet is definately a #132 I wonder if when the previous owner installed the new jet if he also installed the power up kit.

I think at this point you would have to pull the needle to know for sure.

jtcohenour · by **jtcohenour** » Wed May 23, 2007 7:23 am

Is there something specific stamped on it that would signify that it was the upgraded needle?

Asmith · by **Asmith** » Wed May 23, 2007 8:19 am

Full Power needle 16012-KPS-921 stamped C30FF

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