Dynojet Kit Stage 1 vs Rejetting @ Dyno Place

I know pleanty of threads about the dynojet kit already but they don't answer my questions...

What advantage / disadvantage is the Dynijet Kit vs the rejetting at a dyno place ?

I have a K&N & a Remus GP.

I might be able get the stage 1 kit cheap. My local dyno place quoted me £140+vat for a rejet.

where's the dynojet kits cost around £80.

Anyone? WHat's better getting it rejetted at a Dyno place or buy the Stage 1 kit ?

(Need to know asap as someone els might buy the Stage 1 kit...)

[northwind]

My opinion, frankly, is that the Stage 1 DJ kit is utter junk- you get very little and in my experience the directions are poor- the suggested setting were all done for the old K&N, it seems. But at the same time, that price for the dyno work is pretty steep.

K thanks I won't bother then

[northwind]

I think 21Quest would disagree though, to be fair But I reckon you can get 9/10 or more of the benefit with a couple of jets (at £3 a pair from PDQ) and possibly either moving the needle clip or putting a thin washer in to raise it a half step.

You completely lost me.

Too much tech talk

[northwind]

Take little bits out, put bigger bits in

I've never understood the principle behind the Dynojet kits, its like tuning a guitar using a book to tell you how many turns of the machine head! It might run better but its a thousand to one that its going to run perfect.

Even two bikes set up the same can end up up two different carb/PC settings to get the right air/fuel across the range of revs and throttle positions, not to mention run with optimised power (not usually stochiometric ratios).

The ONLY way to get a bike set up right and know its right is on the track with data logging on board or (for the rest of us!) on the dyno/rolling road.

Sound like you were already making the right decision tho!

PS in my experience £140 for an afternoon on the dyno sounds pretty heavy, can you shop about?

[northwind]

Top metaphor action there. The other way to do it, is with a finely tuned ****. You'll probably never get it 100%, but you can get it within spitting distance with enough practice and trial and error. Mine's off to YPE next thursday, we'll see how badly wrong I've got it then I'm thinking that quote includes a DJ or Factory kit, if not then I'd agree it's too steep.

So also a bit like setting up a guitar I suppose, in that you can tune by ear and get a fair result, but if you want perfect intonation you'll want a quality tuner.