Dynojet

[Dom_]

Hi all, been speaking with Graeme France recently as i'm getting a bit of work done on the bike. Anyhoo i've been thinking of getting it dynojetted, the kit costs £105 then £130 for as many dyno runs as it takes to perfect the jetting. £235 is a lot of cash for someone working part time, so, has anyone had their bike dynojetted and is it worth it? Mine does need re-jetting and i figure if i'm keeping the bike for at least 18 months i may as well get it running nicely.

Opinions?

Cheers, Dom.

[Kickstart]

Hi

If it needs rejetting then probably well worthwhile. Main thing with the dynojet kit is the needles supplied can have their positions changed for different revs.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[kb-zxr]

I've had two ZXRs -

1. Standard with micron system
2. KN, Dynojet and micron system.

The 2nd one definately feels a lot sharper and quicker. Its hard to say though if its had any effect on top speed as I've never really had them flat out as such.

[Zimbo]

I'd say it's definately worth it to get it dyno'd and the jets right. It may not be necessary to buy a dynojet kit, just a change of main jets may be enough, but the dynojet kit has new needles which are adjustable in height as well, so it's likely he'll achieve better results using the dynojet kit.
Put another way though, if the bike is running lean and burns a hole in a piston crown, or burns the valves, it's going to cost a lot more. Also, once correctly jetted the bike may well be better on fuel, so will save you a bit in the future.
Lastly, peace of mind that it's all as it should be is worth a bit too, to me at least!
How about spending £30 ish on a dyno run before you commit to buying the kit, just to see how it's running and fueled? You'll be able to see any potential problems, and the benefits of rejetting, before you have to part with much cash. If it does need rejetting I'm sure the overall bill would still be about the same.

[Dom_]

Yeah i'll still probably get the kit anyway, just wanted a few opinions on it, i could get graeme to dyno it before he does any work on it.

[divuk83]

Dyno's are great. For the minimal cost (cheaper than a knackered engine) you can be sure you fueling is spot on and there are no flat spots in your acceleration. I have done loads of dyno runs on my bikes over the years. After the performance I gained on my first visit just from altering the jetting on one of my scoots, I have been a fan of them. I gained 3hp on one of my scoots the first time I went, which was pretty noticeable. Worth the cash in my opinion

Dave

[sanchezz_182]

nah dom just put sum sum 2 stroke in ur tank, thatle even things out if its running lean,, init
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no sig, thats gay!!

[bish777]

you can do your own jetting. Its just that most people are two impatient and not methodical enough.

Going for runs and checking plugs will get you most of the way there.

before you start, set float heights correctly and get the idle circuit perfect and balance the carbs.

Then get a dynojet kit and follow the destructions!
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GSXR1100J

[Dom_]