Im fitting a Neptune Exhaust.

[Sniper]

Now I hear about it with the bigger bikes, but on my little 250, do I need to get the fuel and carbs and everything tuned to the exhaust?

Thanks Guys

[sAsLEX]

No, but if you want performance increases it would pay to! otherwise your likely to just get more noise, which on a 250 can be bad, k14 had a pipe on his but took it off after a week as it hurt to ride with

[Sniper]

Thanks sAsLEX, I think I need to get it tuned so I might do that after the exhaust gets done today.

[**R1**]

yeah I would!

Your bike could end up running lean, not as bad on a 4stroke as it is on a 2stroke, but still not good, get nick at PB down wilsons road to dyno it and run a gas anyliser, and find out if it needs rejetting, my guess (depending how open ya new pipe is) is it will. it might cost you $100 all up but its money worth spending.

[Kickaha]

get nick at PB down wilsons road to dyno it and run a gas anyliser, and find out if it needs rejetting, my guess (depending how open ya new pipe is) is it will. it might cost you $100 all up but its money worth spending.

Nick at PBS has been closed up for months he got a job working on cars and the dyno moved south

[Sniper]

Any idea on where I can go then?

(One of the "bro" mechanics said he can tune my bike for me with a screwdriver and some wire. Im not too keen on this)

[limbimtimwim]

Now I hear about it with the bigger bikes, but on my little 250, do I need to get the fuel and carbs and everything tuned to the exhaust?

To get the best hit out of it, yes, in my limited experience. http://www.kiwibiker.co.nz/forums/sh...ad.php?t=17491 . Muffler+jets+different taper needle+fuel screw fiddling = better top end, and I didn't damage the lower end of the rev range either. I've gained about 15km/h in top gear, and it gets there accelerates much better than it did before.

[Sniper]

Thanks lim, thats exactly what I wanted to hear. Now do I need to get a specific carb set in?

[limbimtimwim]

Thanks lim, thats exactly what I wanted to hear. Now do I need to get a specific carb set in?

I found these guys ( http://www.factorypro.com/Prod_Pages/prodh67.html ). They hate Dynojet with a passion :-). Note the link to the Oz model at the top of the page. Their website is a mess.

Anyway, I called them up, they sent it down to me.

I found a link once to step by step instructions on how to fit that kit to a cbr250rr. Can't find it now, but I think I bookmarked it at home. I'll dig it up if I remember when I get home.

I think with your 4 carbs, I suspect you will have a tougher job getting it working nicely.

When I got my muffler from roo, they also included in the instructions "#118 jets work well" which was what factory pro had sent me. Did Neptune not suggest a main jet size?

[Sniper]

Thanks

Yep, the website is a bit hard to navigate, but I will sort it.

[dangerous]

Any idea on where I can go then?

Kile at the John's rd garage, he has Harris's old dyno and knows his shit.
But being a 250 I'd say you will be ok as it is considering it already had a openish can on it.
whats the neptune look like?
ps: did ya hear the Guz with its Neptunes the other night?

[Kickaha]

ps: did ya hear the Guz with its Neptunes the other night?

Sounded like a Harley didn't it?

[Coyote]

How much is this pipe going to cost you Sniper?

[Sniper]

Well the pipe is fitted and looks pretty good. The bike doesn't seem to have any problems through-out the rev range but Im still going to tune her to make sure.

Alarumba, the pipe cost me $300, it was a second hand one but in mint condition.

Dangerous, thanks for the advise, I'll go to Kile on thursday. I didn't actually get a chance to hear the guzzi, did it sound good?