Alex.

If you have two round headlights, it will not be a 3TJ but an older model, probably a 3EN. A lot of FZR4 owners hang out over at the 400 Grey Bike forum, come on over and have a look. There should be lots more info on your bike. Alex.

The immediately obvious differences are the styling and the brakes. The styling looks more modern on the Diversion, with a trapezoidal headlight rather than the square light of the XJ6. The styling of the XJ6 is very '80s and the Duversion very '90s. As for the brakes, the front brake on a UK spec Diversion is a single disc and the XJ600 a twin disc setup. An XJ600 is here:- XJ600 Pic And a Diversion is here:- Div Pic Alex.

As you have the 1WG, with the engine cradle, any FZR6 engine will fit up to and including the Thundercat. The 3HE engine will bolt in and can use the same wiring loom and all electrics, although it is advisable to modify the loom to accept the 3HE CDI due to the lower rev limit. The Foxeye (4JH) and Thundercat motor will require more work and are best with the complete wiring loom from the donor bike. Then you get on to the question of exhausts. Anything can be made to fit with enough thought and fabrication.... Alex.

The Foxeye has a 160 tyre as standard, so that would not be a problem. But there will need to be some modification to the axle? I'm not sure how the tyre profile will affect the speedo, it's driven from the front wheel. Alex.

Can anyone tell me if the 17" wheel from a 1994 FZR600R Foxeye (4JH) will fit a 1990 FZR600 (3HE)? Alex.

Conversely, when I was looking for an engine case for my FZR600R (generator case, long story!) all I could find on ebay was 3HE cases. These cases were £35 in second hand condition and won't fit the 4JH, I tried. Brand spanking new casing from Yamaha main dealer, £50. guaranteed to fit. Not all parts are expensive from main dealers, they are worth a shot now and again. Alex.