Need Help - Jetting Questions

Plasma · August 28th, 2009, 12:10 AM

my friend has a ninja 250r and he has a slip on exhaust will according to him it was running fine for a while then recently it started to misbehave....he says it doesnt run liek it used too..at the dealer they told him he needed to rejet..tahts cuz the ytold him he didnt have to when eh installed the slip-on...
now my question is now that he wants to rejet...which kit should he get..i reccomended teh stage 2 cuz its on sale ..is that fine? i already told him about shimming but he rather rejet to do things 100%.

thnks guys

kkim · August 28th, 2009, 12:19 AM

does he even understand the difference between shimming and a jet kit?

if not, educate him by showing him this site. if he does, he'd shim it instead.

Plasma · August 28th, 2009, 08:13 AM

sorta..i explained to him to the best of my ability.....
then he said what would be the best?......
i said best performance wise is a jetkit..best on your pocket wise is shimming and yes i sent him both DIY's
i told him shimming the needles would be like getting him 80% there with tuning and the jet kit would get him 100%....i tried to get him to just shim so he didnt spend the $$$.but he seems to not care about the $$..so hey its his bike...i jsut wanted to know if the stage two would be fine for the slip on ?

kkim · August 28th, 2009, 10:39 AM

stage 2 kit from which company? put up a link to the specific kit and we can tell you if it's the appropriate one or not.

if he really wanted to do things 100%, he would have bought a full exhaust instead of a slip on. sounds to me like he just wants bragging rights to say he's got a jet kit in his bike.

JaeL · August 28th, 2009, 02:09 PM

Quote:

Originally Posted by kkim

stage 2 kit from which company? put up a link to the specific kit and we can tell you if it's the appropriate one or not.

if he really wanted to do things 100%, he would have bought a full exhaust instead of a slip on. sounds to me like he just wants bragging rights to say he's got a jet kit in his bike.

Plasma · August 28th, 2009, 08:06 PM

Quote:

Originally Posted by kkim

stage 2 kit from which company? put up a link to the specific kit and we can tell you if it's the appropriate one or not.

if he really wanted to do things 100%, he would have bought a full exhaust instead of a slip on. sounds to me like he just wants bragging rights to say he's got a jet kit in his bike.

http://www.motorcycle-superstore.com...50R-Parts.aspx

lol well i guess money isnt an issue...and the dealer advised him to do it so....
go figure....

kkim · August 28th, 2009, 08:53 PM

that will work if he intends to use the airbox.

istreefitty · August 28th, 2009, 09:05 PM

kkim which jet kit would you recommend if one were to have a full exhaust with out the snorkle and the upgraded k&n air filter??? I was thinking about Dynojet but apparently you know better. thanks for any help

kkim · August 28th, 2009, 09:14 PM

either would work. just make sure to buy the one that is designed for use with or w/o an airbox. I notice they now have kits for airbox and non airbox applications. The main difference between those kits are the size of the main jets they provide.

Between which brand to buy, they both will provide similar results. The fine tuning will make the real difference in the end. I went with Factory Pro, but others have had great results with Dynojet kits.

Take a look at the jetting database and see what others have used.

August 28th, 2009, 12:10 AM	#1
Plasma ninjette.org member Name: Rigo Location: Pharr, Tx Join Date: Jun 2009 Motorcycle(s): 2008 Ninja 250R Candy Plasma Blue Posts: 72	Need Help - Jetting Questions my friend has a ninja 250r and he has a slip on exhaust will according to him it was running fine for a while then recently it started to misbehave....he says it doesnt run liek it used too..at the dealer they told him he needed to rejet..tahts cuz the ytold him he didnt have to when eh installed the slip-on... now my question is now that he wants to rejet...which kit should he get..i reccomended teh stage 2 cuz its on sale ..is that fine? i already told him about shimming but he rather rejet to do things 100%. thnks guys

August 28th, 2009, 09:05 PM	#8
istreefitty sir posts a lot Name: michael Location: HI Join Date: Jul 2009 Motorcycle(s): '09 Black 250R Posts: 267	kkim which jet kit would you recommend if one were to have a full exhaust with out the snorkle and the upgraded k&n air filter??? I was thinking about Dynojet but apparently you know better. thanks for any help __________________________________________________ A girl walks into a bar and orders a "double entendre" So the bartender gave it to her "once you go black, you never go back."

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August 28th, 2009, 12:19 AM	#2
kkim Join Date: Nov 2008 Posts: Too much.	does he even understand the difference between shimming and a jet kit? if not, educate him by showing him this site. if he does, he'd shim it instead.

August 28th, 2009, 08:13 AM	#3
Plasma ninjette.org member Name: Rigo Location: Pharr, Tx Join Date: Jun 2009 Motorcycle(s): 2008 Ninja 250R Candy Plasma Blue Posts: 72	sorta..i explained to him to the best of my ability..... then he said what would be the best?...... i said best performance wise is a jetkit..best on your pocket wise is shimming and yes i sent him both DIY's i told him shimming the needles would be like getting him 80% there with tuning and the jet kit would get him 100%....i tried to get him to just shim so he didnt spend the $$$.but he seems to not care about the $$..so hey its his bike...i jsut wanted to know if the stage two would be fine for the slip on ?

August 28th, 2009, 10:39 AM	#4
kkim Join Date: Nov 2008 Posts: Too much.	stage 2 kit from which company? put up a link to the specific kit and we can tell you if it's the appropriate one or not. if he really wanted to do things 100%, he would have bought a full exhaust instead of a slip on. sounds to me like he just wants bragging rights to say he's got a jet kit in his bike.

August 28th, 2009, 08:53 PM	#7
kkim Join Date: Nov 2008 Posts: Too much.	that will work if he intends to use the airbox.

August 28th, 2009, 09:14 PM	#9
kkim Join Date: Nov 2008 Posts: Too much.	either would work. just make sure to buy the one that is designed for use with or w/o an airbox. I notice they now have kits for airbox and non airbox applications. The main difference between those kits are the size of the main jets they provide. Between which brand to buy, they both will provide similar results. The fine tuning will make the real difference in the end. I went with Factory Pro, but others have had great results with Dynojet kits. Take a look at the jetting database and see what others have used.