more power out of 1wg??? please help

[chrisb]

Hello

ive got a standard 1988 fzr 400 1wg, looking how to add bit more power ???
ive been told many things like fzr 600 carbs but people say not to?

anyone know any mods that are readily available and that wont cost the price of an r1

please help cheers
chris

[Evilchicken0]

The 600 carbs are the same as the 400's but with different settings.
You have a 3en1 exup (Twin headlights and airintakes above the lights) ???

Bad news is, it's kinda an old bike and there isn't a whole lot you can do as a cheap fix for power. Probably the best thing is to make sure what you have is running right so the cheapest thing is to service the engine with: new air, oil and fuel filters; fresh oil; coolant. Clean the chain and if it's worn replace it then lube it. Renew the brake fluid front and rear.

The secret to speed on a 400 is momentum and that means good handling so new fork spring oil and seals in the front and an R6 shock and different dogbones for the rear (the shock is known to be stif and a softer spring will help) that would come in around £150 each end.

Next brakes: If you don't have braided hoses fit some you need a 3 line set a two line with the standard master cylinder will touch the rev counter bezel which is an mot fail. Then you can fit Blue Spot calipers from a later Yamaha like R6. Obviouslt the pads need to be in good condition and so do your disks.

Now having done that you could fit up the 3HE 600cc engine it should bolt straight in, but you'll need the engine, carbs (it's easier than resetting yours) down pipes CDI and maybe the loom.

[chrisb]

cheers for the reply

i thought about the rear shock, do you need the longer dog bones?
with regards to the front, is their different springs ie r6?, or even a different front end maybe?
the bike allready has braided hoses on, ive got a set of blue spot calipers off an 04 r6 which will be going on.

[Kayla850]

You need slightly shorter dogbones on the rear to bring the ride height back to normal if you fit an R6 shock, but it's a good mod that works. To be brutally honest, I'd spend money on servicing the bike (oil, filter, fork oil, new coolant, fresh brake fluid and braided lines) before even thinking about trying to bolt more power on.

Have you had the bike very long?

[Evilchicken0]

oppps - sorry shorter dogbones, I knew the bike needed to be raised after the shock mod.

You could bolt in a different front end, but your looking at a cost. The cheapest would be FZR600 3HE with 38mm forks and 298mm disks (the 3en1 has 285mm), you'll have to do some homework to find the year though.
Next there's the FZR600R 4JH - it has 41mm forks and the same front wheel as the 3TJ don't know your spindle dia so I can't say if that would bolt up but you'll need the forks, discs triple clamps and clipons minimum.
After that the ThunderCat, early FZS600 Fazer and R6, I think they're 41mm for the frist 2 and 43mm forks for the R6 - but these options get expensive and they use a 120 profile front tyre.

Think about what your going to do biking wise in the longer term. It might be better to keep this bike for a year or so and save your money, then buy the R6, they're about £2500 atm or £2000 if you don't start modding your bike.

[chrisb]

cheers for the replys,

with regards to the rear shock, is it possible to leave std dog bones on to lift the rear up slightly as its quite low?
would that affect the handling?
think il just change the fork oil for now. im using the bike for work and try a couple of trackdays as ive never done one before, then next year just use it for track bike only maybe, not sure yet
how much fork oil does the 1wg hold?

cheers
chris

[Evilchicken0]

You'd need to do the dogbones with the R6 shock mod because the it's a shorter shock than the 3en1. You do it to restore the ride height. Post a picture it's easier than just guessing if your bike it low at the back. Chances are though it will be ok if it wasn't the shock would be completely shot and you'd soon know if that had happened.

[chrisb]

ive ordered a 02 r6 shock, is that longer dog bones or shorter then(ebay ??)
thinking bt 090 tyre for rear 150 60 18

has any one ever put k & n style air filters on the carbs?
cheers
chris

[Evilchicken0]

Hang on a bit - you want the R^ shock with a RED spring like this http://cgi.ebay.co.uk/Yamaha-R6-Rear-sh ... 27b717f1d4

Kayla makes the dogbones

The BT90 is a good tyre for the 400

Yes - you can fit the FZR600 3HE K+N filter, it doesn't give any more performance but you'll be able to clean it rather than just renew it. It's the air box shape that restricts the engine not the filter

[Kayla850]

Yes, you need a 2006-on R6 shock and slightly shorter dogbones. I've tried RamAir foam filters on 1WG, 3TJ and 4JH (600) engines and it's not worth the hassle or expense of buying them, sorting jets and then paying for the extra fuel you'll use making more noise I've gone back to the airbox on my 4/6