FZR400 3tj6 rrsp

[28hodge]

Hoping someone with a little more 3tj knowledge can help me out please

Frame numbers for a genuine 3tj6 should range from 1TJ-152101 - 1TJ-154000 is that right?

Engine numbers, is there a range that they should be, I assume that all 3tj's use the same engine casings etc and it is just the internals that are different with the different valves etc and CR box, but did the rrsp's 3tj6's have a specific range of engine numbers and if so does anybody know what these are?

I know the 3tj6 & 7's had the flatslides but unfortunately the one I am potentially looking at has had these taken and just has the mikuni CV carbs, it does have all the SP suspension though.

At the minute I am starting to think that this bike is a 3tj6 rrsp frame with sp suspension and not a lot else, its a project and comes with a additional rr 3tj frame and a sp 3tj6 frame that has taken a couple of knocks. however if I can confirm that the casings are at least correct for a 3tj6 then I will have to take the risk and assume that the internals are still rrsp.

im in two minds with what to do about it now, ive always wanted a 3tj and idealy a 6 or a 7 with the flatsides. the spare frame would be good as I could use that to make a 4/6 again something I have always fancied building for some bemsee thunderbike racing, again something I have always fancied doing, hmmmm decisions decisions!!

edit

just spoke to the seller and he does not think the swingarm has the bobbins on it so looking likely that its just an rr swingarm, am I right in thinking that this also means it'll no doubt have the RR caliper mount and more than likely the standard rr wheels rather than the sp captive spacers?

going colder and colder on the deal at the min unless the price can be negotiated a little to reflect this.

[Evilchicken0]

All fzr400's have the engine number 1WG
You mean the rear brake hanger ?

This is an ex race bike huh ???

[28hodge]

Thanks ec

Do they not have and individual serial number after the 1wg part? I think the sp shim buckets and valves have a yellow dot on them to identity them as the lighter parts, is that right and the standard ones are green?

Read that somewhere yesterday I think. It's got the oil cooler rad pipe on it so I think it has to be an sp engine?

Yeah ex race bike but I think its a bitsa from somebodies race spares, might be wrong it's just missing odd bits really, I understand the carbs going walk about and finding a new home but the swing arm and wheels you'd have thought would have stayed with the frame!??!

But I also think its as close to a full rrsp I'll get as I'd not feel to good about taking a road 3tj6 rrsp and putting it on track!

[Drunkn Munky]

If your after a 3tj sp for the track I have one and its cheap drop me a pm if interested.

[Evilchicken0]

If it's ex-race then parts can be swapped on and off as needs be, the rear wheel will work with the swingarm so it's likely the two willl be swapped together

[dobbslc]

You could ask to look at the clutch, 9 plates = sp 8= rr.
Thats a bit less likely to have been messed with.
Just tip the bike over a bit then whip the cover off, no oil should come out.

[Kayla850]

If it's the one I'm thinking of, there was a trick exhaust as well which is worth a bit. Bump start only as well I think (and possibly total loss). The subframe and exhaust hanger are SP but the swingarm was standard RR if I remember right. I got the BDK carbon ram air box (long gone) and some other bits and bobs from it. It's still worth the money if you go through what's there and total it all up plus there might be a cool ignition rotor and other gubbins hiding behind the engine covers...

edited to add- it'd make a good 4/6 project- sell the 400 engine to a racer and put it towards a cheap 4JH 600. Rob what you need from the 600 and sell the rest (you should recoup most of what you spend on the donor if you can get one for £600 or so)

[28hodge]

If it's ex-race then parts can be swapped on and off as needs be, the rear wheel will work with the swingarm so it's likely the two willl be swapped together

Yeah but I don't get why you would part out a RRSP part that is superior to fit the standard RR part, its not superior in performance granted but it is in design and ease of use, Just think its a bitsa pieced together by a race team from spares and bits thay had left to put a bike together to sell it, Which in a way id fine, but it does dimish is desirability a little.

Also the frame numbers he has given me today both come up as 1990 RR frames, he said one was a uk RR frame with V5 and the original one was a RRSP 1992 frame that was from Japan and had no uk registration.

Frame numbers are 3tj-115299 this should be the standard UK RR frame according to the seller
3tj-142019 this is the japan frame that should be a 1992 rrsp

I rung fowlers and had them check the frame numbers but both show up on their system as 1990 rr frames.

Engine has the oil cooler on it, can this be retro fitted to an RR engine?

I'm back and forth on what to do with this bike still think it might be a decision best made after 2 pints on Friday night, after all that's how I ended up winning my NC30 off ebay!!

[28hodge]

If it's the one I'm thinking of, there was a trick exhaust as well which is worth a bit. Bump start only as well I think (and possibly total loss). The subframe and exhaust hanger are SP but the swingarm was standard RR if I remember right. I got the BDK carbon ram air box (long gone) and some other bits and bobs from it. It's still worth the money if you go through what's there and total it all up plus there might be a cool ignition rotor and other gubbins hiding behind the engine covers...

edited to add- it'd make a good 4/6 project- sell the 400 engine to a racer and put it towards a cheap 4JH 600. Rob what you need from the 600 and sell the rest (you should recoup most of what you spend on the donor if you can get one for £600 or so)

sounds like you know the bike Kayla

no starter motor so bump start only
Airbox is also AWOL
and from what I can tell from the pics a RR swingarm
Asked about the exhaust but he said that was standard so that might have gone too.

On another note Kayla read and old post you had about a 4/6 in thundernbikes being allowed now? is that the case?

[Kayla850]

If it's ex-race then parts can be swapped on and off as needs be, the rear wheel will work with the swingarm so it's likely the two willl be swapped together

Yeah but I don't get why you would part out a RRSP part that is superior to fit the standard RR part, its not superior in performance granted but it is in design and ease of use, Just think its a bitsa pieced together by a race team from spares and bits thay had left to put a bike together to sell it, Which in a way id fine, but it does dimish is desirability a little.

Also the frame numbers he has given me today both come up as 1990 RR frames, he said one was a uk RR frame with V5 and the original one was a RRSP 1992 frame that was from Japan and had no uk registration.

Frame numbers are 3tj-115299 this should be the standard UK RR frame according to the seller
3tj-142019 this is the japan frame that should be a 1992 rrsp

I rung fowlers and had them check the frame numbers but both show up on their system as 1990 rr frames.

Engine has the oil cooler on it, can this be retro fitted to an RR engine?

I'm back and forth on what to do with this bike still think it might be a decision best made after 2 pints on Friday night, after all that's how I ended up winning my NC30 off ebay!!

RR and SP frames are physically identical, it's just the number that identifies it as either 'RR' or 'SP'.

UK model 4DX engines also had the oil cooler fitted and they're interchangeable with standard 3TJ engines. To be honest there's no real need and it's one more thing to go wrong. I always blanked the oil cooler take-off off on 4/6s that we've built (4JH engines have the same oil cooler arrangement).

SP and RR rear wheels are the same, it's just the bearings and inner spacer that are different (plus the actual wheel spacers themselves). You can fit the larger inner diameter bearings (they have the same outer diameter) to a standard RR wheel and use the correct inner spacer and it will magically turn into an SP wheel. The SP caliper hanger is slightly different in that it's held captive in the swingarm and there's a small lip on inside of the left side axle adjuster that the captive spacers rest on to make fitting the wheel a little easier.

SP front wheels are different to standard RR wheels, they use different bearings and you can't fit SP bearings (20mm inner diameter) to an RR wheel (17mm id bearings) without having the bearing seat machined out to a slightly larger diameter.

4/6s are allowed in Thunderbikes and loads of other clubs' pre-injection 600 classes as well. I whined quite a bit about the stupid prescriptive Thunderbikes rules a few years ago and they ended up changing them. I have no idea if I had anything to do with the change or not though!