Suzuki GSX-R250R modification?

[The Little Gixxer]

So I brought a 1989 Suzuki GSXR 250R GJ72A. It goes fairly well but I am making a few adjustments that I would like some help with.

For starters I brought it with no fairings so the front end is looking a bit dodgy so I am making something up to replace it but am unfamiliar with the laws in relation to what I can and can't do with custom headlights and indicators. So the basic idea is in this clip (yes it is a hayabusa but hey I like to have fun) http://www.youtube.com/watch?v=IZRwwqSESEk .

In saying this custom dials or something like that would be good but am wondering what I can do away with. The current Fuel gauge is broken so go by km on the odometer so maybe cut back to just the two dials, would this be a workable solution? And legal?

Next is to get more air through the engine. The boys at work would love to custom build a turbo for it but I think this might be asking for trouble so maybe replace the original box with K&N intakes and do something with the exhaust and carbs but not sure what and where to start as no-one seems to have done anything like this (probably because it isn't worth it really but I like to muck around with my ride)

So yeah bit of a starting spiel but any help would be appreciated.

Thanks

[FJRider]

For starters I brought it with no fairings so the front end is looking a bit dodgy so I am making something up to replace it but am unfamiliar with the laws in relation to what I can and can't do with custom headlights and indicators.

In saying this custom dials or something like that would be good but am wondering what I can do away with. The current Fuel gauge is broken so go by km on the odometer so maybe cut back to just the two dials, would this be a workable solution? And legal?

Next is to get more air through the engine. The boys at work would love to custom build a turbo for it but I think this might be asking for trouble so maybe replace the original box with K&N intakes and do something with the exhaust and carbs but not sure what and where to start as no-one seems to have done anything like this (probably because it isn't worth it really but I like to muck around with my ride)

So yeah bit of a starting spiel but any help would be appreciated.

Thanks

1. Custom fairings and lights are legal.

2. Dials fitted and working are your choice.

3. More air to the engine alone makes it lean. Not good. More air and fuel makes a bigger bang in the cylinders ... and the really big bang comes later. To get ANY reasonable increase in power needs $$$$$ / time. With a (very) shortened engine life span.



If you want more power ...buy a bigger cc bike. Easier and cheaper long term.

[EJK]

Sell your bike and buy this. Best performance upgrad ever.

http://www.trademe.co.nz/Browse/List...x?id=693876285

[bogan]

Custom headlights/fairing and dials are all good, as long as they do the job they need to. If you're ebaying lights, be aware some reflectors are LHD or RHD. Power, I'd recomend getting into tuning on something a lot easier, the era of screaming 250s were pretty damn good power wise, and pretty damn hard to tune em right, from what I've heard anyway.

[SMOKEU]

Don't waste too much money on it with "performance" mods that give minimal (if any) gains in power, especially on a bike that's not worth much come upgrade time. If you start fucking around with removing the airbox and replacing it with aftermarket intakes it will probably won't make any noticeable difference, except to your wallet. If you want to go faster, then buy a bigger bike.

[Tazz]

Turbo. You have to turbo

[R650R]

Save your money for the next bike or trade it now for an RGV250

I had one of these Blind Man's Dream bikes, FZR250 Exup 18000rpm. Did fish and chip delivery on it, spent all my wages just on the upkeep.
These little four cylinder screamers are bigger money pits than their bigger brothers. I'd say at that year/age it prob needs a valve grind at the least.
Not sure if any of the 400cc bikes are LAMS approved but I went up to a ZXR400 after the Yamaha and it was awesome but manageable.

[The Little Gixxer]

Ok so general consensus:

Fairings etc all good but air intake no good unless lots of money spent.

So Turbo is the way to go then.

Does anyone know of someone with a bit of experience in this who could help with this? Failing that I can just let the boys from work at it, I do have a spare engine as well so will be using that as a dummy until it is running correctly.
Thanks

[SMOKEU]

Ok so general consensus:

Fairings etc all good but air intake no good unless lots of money spent.

So Turbo is the way to go then.

Does anyone know of someone with a bit of experience in this who could help with this? Failing that I can just let the boys from work at it, I do have a spare engine as well so will be using that as a dummy until it is running correctly.
Thanks

What are you trying to achieve here exactly? Turbocharging that bike is going to cost far more than the bike is worth if you want it to be even semi reliable and legal. If you don't care if the engine blows up after a very short time then by all means chuck a turbo on it, but don't be surprised if it melts a piston or spits a rod out of the block if it's not properly set up for it.

You'd be better off getting the bike into a good running order, and spending as little on it as possible (but still maintain it properly), and save all that money for your next bike. Even a 15 year old 600cc Japanese sports bike will be much quicker than a turbo 250 (unless you spend many thousands of $ on the 250). Just ride the fucking thing and one day you'll have enough cash for a decent bike.

[Laava]

Ok so general consensus:

Fairings etc all good but air intake no good unless lots of money spent.

So Turbo is the way to go then.

Does anyone know of someone with a bit of experience in this who could help with this? Failing that I can just let the boys from work at it, I do have a spare engine as well so will be using that as a dummy until it is running correctly.
Thanks

Don,t waste your money on engine mods. Do the cosmetic stuff to your satisfaction. If you are after performance you should buy a bigger bike.

[The Little Gixxer]

Hmm seems like you all want me to just buy a bigger bike and yes that makes sense but I don't think I will be giving up the idea of a Turbo Screamer. I will do the cosmetic stuff and start working some little things and see what happens next. After all I have a whole spare to work on. Will have to keep a photo log if I do and then see some of those bigger bikes for some fun I suppose.

[bogan]

Reckon you'll need more'n just one spare engine if you wanna do the turbo thing properly.

Also, won't a turbo on such a high revving bike result in brutal turbo lag?

[FJRider]

Hmm seems like you all want me to just buy a bigger bike and yes that makes sense but I don't think I will be giving up the idea of a Turbo Screamer. I will do the cosmetic stuff and start working some little things and see what happens next. After all I have a whole spare to work on. Will have to keep a photo log if I do and then see some of those bigger bikes for some fun I suppose.

The standard factory turbo bikes actually have a low compression ratio ...to allow for the increased pressure when the turbo kicks in. To not have this lower compression ... will mean the original design limits your bike was built to meet will be met (and exceeded the minute you get past idle) Please google 250 cc factory turbo bikes ...

Good luck with that ...

[blackdog]

Fuck yes turbo it. Then squirt a few ounces of NOS up it half way down your first run on a quarter mile.

Make sure there are alot of cameras.

And paramedics.

[FJRider]

Fuck yes turbo it. Then squirt a few ounces of NOS up it half way down your first run on a quarter mile.

Make sure there are alot of cameras.

And paramedics.

And steel lined underpants ... to be safe ... (it does get in)