Does a JetKit actually make a bike more powerful?

I am finding my jetkit is fouling plugs if anything and using more fuel!!!

Poo on jetkits!!

 

why did you install the jet kit? was full exhust added??
you need to dial it in if you added anything that would require the jet kit.

 

Jet kits

It is my opinion that they do not and are a waste of time and money. Most lean issues can be corrected with small changes to jetting and air/fuel adjustments and maybe a slight shimming of stock needles. When it comes to jetting a little is alot.That is my opinion , please do not yell at me or try to change my mind because you can't.

 

Did you add a jet kit in conjunction with other mods? Or just try to get more out of the bike "stock"?

Shimming/adjusting stock needles has been plenty effective in my experience, on a stock machine.

If you make significant changes to the intake or exhaust, then you may need more options than the stock jetting will allow.

EDIT: I'm not super familiar with the bikes in your profile... but wanted to throw this out there -- is the choke actually an enricher? When you were playing with the carb, is it possible that the choke is stuck out?

 

"SOME TUNING MAY BE REQUIRED" should be a black box warning with jetkits.

90% of the time you can follow the recommended settings, but not always.

jet kits are most useful for filling in dips in the powercurve and also add back power a modified exhaust or intake system might loose due to leanness.

in your case read the instructions again, and try to figure out which rpm range is fouling your plugs, then modify from there.

If you have a Dynojet setup, read the FactoryPro instructions for more info, and vice versa.

fuel mileage normally declines with a kit.

 

I've had fairly decent luck with most of the jet kits I've installed, if you follow instructions to the letter and don't flub something up. I've also seen some some really crappy running bikes with jet kits installed.

I tend to agree with Toecutter...if a customer wants it I'll do it...but I rarely recommend it. Seems like the cheap soft needle material most jet kits come with wear quite a bit over time (from rubbbing the needle jet I suppose). So over the course of several thousand miles, the mixture gets richer...and that sucks.

 

this is a tricky question, unless you have the skill set with a Dyno then maybe, otherwise No!

 

The jetkit came preinstalled on the bike.

The bike runs real nice at 60km/h anything above and it appears a little rough.

I am not a fan of performance mods as for me it is always a losing game...if I want performance i would buy a zx11 /zx14.

I didnt buy the VFR for performance..contrary to what people on the board think about the VFR.

 

and the bike does have an aftermarket Gianelli exhaust

 

something you want to tackle, that is fine tuning it??
and do you have any of the extra jets that would have came with the kit?
If not you would be looking at about 2 hrs or so at a local cycle shop to fine tune it for ya.

 

and to get past the seat of the pants feeling you need to do this on a Dyno to really know whats going on. talk about going to a lot of work for what??

 

I say just keep randomly switching all the jets around and at the same time have a contest to guess what the A/F ratio is, the winner gets to keep this thread going.

 

The only issue is that the plugs are getting fouled.

I am thinking of going to splitfire or platinum plugs since I think they foul less????

Thanks for all the help !!!

 

You need to be sure that the plugs in the engine are EXACTLY what the owner's manual specifies.
=

If your air filter is dirty replace it.

Know how to do a plug-cut?? install a new sparkplug and check plug color at high speed

Your problems are most likely related to wrong mainjets, worn needles, wrong needle slot adjustment, float levels too high......

 

Ok Is it easy to remove the carbs from the bike...They look like they are not!!

I'll check the manual but its probably easier to just purchase some good used carbs...

That being said....anybody got any for sale?

Regards,

 

ANY carbs you might purchase would most likely need a thorougth cleaning to start with and possible adjustments to tune it to your exhaust.

AS for removing carbs from bike......... it's MUCH easier than refitting them !!