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Post by doublert on Jun 19, 2013 18:26:58 GMT -5
I think I need to rejet my carb. and just want some input or advice from everyone. All the upgrades and performance mods are in my sig. below including 26mm ebay carb. (not sure what jet is in it), stock air box removed, K&N type filter on 6inches of radiator hose to carb, Two Brothers racing exhaust, 30mm NCY intake polished, NGK iridium plug,etc. I checked my plug the other night and it was black. Anyone have any suggestions which Jet? Or should I just get a kit of 5 off Ebay ranging from 105 to 125?
Thanks to All!!!
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Post by scootnwinn on Jun 19, 2013 18:29:37 GMT -5
You should find out what's in there and the look for something smaller
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Post by doublert on Jun 19, 2013 19:20:07 GMT -5
You should find out what's in there and the look for something smaller Just wondering, why would I need something smaller with all that stuff I have done to it, Filter, exhaust,etc. I've been trying to look at everybody elses mods and performance parts to figure out what kind of jetting I need to do...  |
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Post by hank on Jun 19, 2013 19:32:57 GMT -5
Hi If your plug is black shes running very rich so you need smaller jets to lean her out, the little poem found here sums it up well www.mopedarmy.com/wiki/Plug_chopTake care and ride safely Yours Hank |
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Post by jerseyboy on Jun 19, 2013 20:15:19 GMT -5
Yup,,that 26mm carb is a BIG BOY for that 150,,prolly came with a big jet,,if you lean it out a little,,you will gain performance,,light chocolate brown my friend
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Post by doublert on Jun 19, 2013 20:21:54 GMT -5
Yup,,that 26mm carb is a BIG BOY for that 150,,prolly came with a big jet,,if you lean it out a little,,you will gain performance,,light chocolate brown my friend Ok, thanks, should I adjust the air/fuel screw, or take the jet out of my stock carb and put it in the 26mm carb? |
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Post by alleyoop on Jun 19, 2013 20:31:10 GMT -5
Just so you know all the mods you did the ONLY ONES that require an UP-JET is a FREE FLOW FILTER and FREE FLOW MUFFLER all the other stuff has nothing to do with requiring to re-jet your carb. What is throwing it off is the 26mm carb, you did not need to waste your money on a 26mm carb the 150s comes with a 24mm carb which feeds plenty of fuel and even if you bored the motor out the 24mm will still work just fine just need a bigger jet.
The 26mm carbs Venturi is bigger and they do come with bigger jets. For what you have you would need a 110, 112 or a 115 main jet. The Pilot jet may also be to big in that 26mm carb, if its a #38, Replace it with a #35.
Alleyoop
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Post by scootnwinn on Jun 19, 2013 21:57:14 GMT -5
Looking at what works on one motor can be deceptive. You need to also consider altitude, temperature, and relative humidity when setting up the bike. Every engine is somewhat unique as well.
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Post by hank on Jun 19, 2013 22:05:33 GMT -5
Hi DX I agree with you Rob every one is different in some way and you need to tune and mod for yours and the scoots particulars wants and needs What may work great for me may not work for some one else even if the have the same exact scoot And their in lies the fun and adventure   ;D Take care and ride safely Yours Hank |
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Post by alleyoop on Jun 19, 2013 22:59:44 GMT -5
The motors on these scoots are easy as pie to setup, temp changes are a piece of cake to adjust for. The Carbs are very simple and easy to adjust and only a couple things that can go bad that you can get in a re-build kit, but your better off just buying a whole new carb they are so cheap. You have to know motors and what they need in different enviroments if you don't you will have a poor running motor down on power.
Give the guy some meaningful information to get his motor to run good, not just off the wall stuff that motors are different and temps and the sky is blue stuff. But I understand if you do not know you do not know and that is fine everyone learns something every day.
Alleyoop
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Post by hank on Jun 19, 2013 23:09:21 GMT -5
The motors on these scoots are easy as pie to setup, temp changes are a piece of cake to adjust for. The Carbs are very simple and easy to adjust and only a couple things that can go bad that can get in a re-build kit, but your better off just buying a whole new carb they are so cheap. You have to know motors and what they need in different enviroments if you don't you will have a poor running motor down on power. Give the guy some meaningful information to get his motor to run good, not just off the wall stuff that motors are different and temps and the sky is blue stuff. But I understand if you do not know you do not know and that is fine everyone learns something every day. Alleyoop Hi There ya go again dismissing what others have to say because you dont agree with their point of view And then on top of it you make insulting remarks about them We answered his question in our first posts and what rob and i said about differences in scoots and their setups is valid even if you dont approve Imho your just coming off as a know crass know it all Take care and ride safely Yours Hank |
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Post by alleyoop on Jun 19, 2013 23:24:36 GMT -5
The motors on these scoots are easy as pie to setup, temp changes are a piece of cake to adjust for. The Carbs are very simple and easy to adjust and only a couple things that can go bad that can get in a re-build kit, but your better off just buying a whole new carb they are so cheap. You have to know motors and what they need in different enviroments if you don't you will have a poor running motor down on power. Give the guy some meaningful information to get his motor to run good, not just off the wall stuff that motors are different and temps and the sky is blue stuff. But I understand if you do not know you do not know and that is fine everyone learns something every day. Alleyoop Hi There ya go again dismissing what others have to say because you dont agree with their point of view And then on top of it you make insulting remarks about them We answered his question in our first posts and what rob and i said about differences in scoots and their esetups is True even if you dont approve Imho your just coming off as a know crass know it all Take care and ride safely Yours Hank HAHAHA, I Knew you would come on and give me the poop, your so predictable it is funny. Not dismissing anything you two ragged on my MEANINGFUL advice. I did not see you helping him with concrete advice just blue sky stuff and that is because you can't you do not know enough to help with details. So don't come off as a goody goody two shoes I know you like a book. Alleyoop |
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Post by geh3333 on Jun 20, 2013 0:23:56 GMT -5
[replyingto=scootnwinn]scootnwinn[/replyingto]I do agree with what scootnw says about every engine being somewhat unique. Somehow my 32mm carb with the 125 main jet works great i wouldnt change it for anything else. The only thing i can think of is that the uni i am using being much bigger then what i see everyone else using has increased my airflow and of course im able to get the full use of the 30mm intake and ncy racing head and my performance exhaust by using the 32 mm carb. Otherwise if i were to use a 24 or 26 mm carb they would be restricting the airflow to a point by going from the 30 mm intake to a 24 mm carb and to think that others use a smaller uni on this setup. There is def room for more airflow and i dont know of anyone else using a 58.5 bbk that can hit 67-68 on a flat stretch. Definitely makes sense.
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Post by geh3333 on Jun 20, 2013 1:15:13 GMT -5
Im not sugesting everyone should buy a 32 mm carb, i just think there is still some airflow many are possibly missing out on by not matching up ports from the head to the manifold to the carb and beyond. Especially going larger to smaller this causes restriction.
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Post by alleyoop on Jun 20, 2013 1:17:33 GMT -5
Doublert,
Just noticed you have a 30mm intake, check if your head intake is smaller than 30mm. If it is the 30mm intake since it is bigger than your head intake is leaving part of the head intake showing which will effect the fuel and air flow into the intake. Many forget about the size of the intake on the head and stick a intake that is bigger than the heads intake.
Alleyoop
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..BAD TO THE BONE..
