3EN2 3TJ rear wheel swap

[dave_paxo]

I want to put a 3tj 17" rear wheel in my 3en2, is it a straight swap or will I need mods/spacers
Will the 3en2 brake disc fit on the wheel or do I need the 3tj one?

Any help gratefully appreciated

[Evilchicken0]

You need to talk to Kayla about it but from what I remember
The 3TJ tyre doesn't fit the 3en2 swinger if the chain is new ... I think somebody found some EN swingarms are slihtly wider than others. Fitting the 3TJ swingarm needs a bit "easing" into the 3en2 frame but I'm not sure how much.

The rear disc is the same though :)

[freefallfil]

Hi-try talking to Kayla(on here Kayla850).She's up to speed (& many others on FZRs)on this conversion-probably the easiest way forward is to fit the whole swing arm & wheel assy-even this will require spacers (x2 top hat type).Hope this helps-good luck,Phil.

[Kayla850]

Wotcher

You can put a 3TJ wheel in a 3EN2 arm but it's a bit of a pain to be honest. You'll need spacers to sleeve the 3TJ bearings down from 20mm to 17mm, and the left side (chain) spacer needs to be turned down to give 1mm clearance between the adjuster block and the sprocket carrier to line the sprockets up. The wheel might then be 5mm too far to the right because the 1WG front sprocket sits 5mm further in, relative to the centre line of the bike, than the 3TJ front sprocket. Once you've sorted that mess out, you'll realise there's not a massive amount of room to fit a caliper hanger on the other side... I gave up when I got to the caliper hanger just because I had a couple of 3TJ rear ends kicking around the workshop at the time. It's easier to use the full rear end. You'll need shorter dogbones though (130mm if you're using an R6 shock as well, or 138mm if you've kept the standard shock)

Another couple of ways around the 18" conundrum would be to buy and try a Cagiva Mito (4 x 17) or Ducati Monster/SS 600 (maybe 750 too) 4.5 x 17 wheel. I haven't tried it so I can't say if it works or not, but they seem quite narrow across the hub and are the right size, plus there are loads of them around so quite cheap.

Failing all of that, you can still get BT090s in 18" sizes

[Kurlon]

The new CBR250R wheel is nice and narrow in the hub also. Dirt cheap to buy new from Honda to boot. I've got notes somewhere covering what it looked like would be needed to mount it on a 1WG and it wasn't much past custom spacers IIRC.

[Evilchicken0]

The Yamaha rear brake disc is 210mm its the smallest standard disc you can get and has its own stud pattern. Using a different type of wheel you might need the disc to fit it, for a Honda nc29 you can cut down the disc and use the original caliper and hanger. You also need to check the chain run is straight spacing a sprocket isn't too difficult though.

[Kurlon]

Bear in mind, this is all in comparison to the 1WG rear end, dunno how it compares to the 3EN2 / 3TJ setup.

Sprocket side, the CBR250R carrier puts the sprocket at the correct offset from center to match the 1WG.

Rotor side, the CBR's rotor is carried 4mm closer to center than the 1WGs, the CBR sports a 220mm rotor.

The CBR250R uses a 6204 bearing in the sprocket carrier, a 6203 bearing in the wheel sprocket side and a 6303 bearing rotor side.

[dave_paxo]

I have today collected an entire rear end off a 3TJ model, including shock and dogbones, do i still need different dogbones as previously mentioned or will using the 3tj set up be ok?
Also I recall reading somewhere that I need to sleeve the swingarm bearings as the spindle size is different to that of the 3EN2, does anyone know if this is true as I'd like to have all the parts together before pulling it apart, or can I just get bearings with q different inner diameter to suit?

[Kayla850]

I have today collected an entire rear end off a 3TJ model, including shock and dogbones, do i still need different dogbones as previously mentioned or will using the 3tj set up be ok?
Also I recall reading somewhere that I need to sleeve the swingarm bearings as the spindle size is different to that of the 3EN2, does anyone know if this is true as I'd like to have all the parts together before pulling it apart, or can I just get bearings with q different inner diameter to suit?

If the dogbones you have are 130-138mm long you won't need new ones. If they're not, you will.

You will need to sleeve the bearing spacer tube down from 20mm to 16mm, you can't buy bearings with a smaller inner diameter that fit the 3TJ arm.

Send me a pm or an email and I can sort you out with actual facts from having done it rather than hearsay and conjecture.