need info on an engine swap Options

[fzrwayne]

ok girls lol im poss to be going buyinga thundercat engine carbs and down pipes to put in my fzr400r exup 1wg. i understand that the engine goes rite in with noproblems but could any of you tell me something i should know about getin it to fit to getin it to go down the road safely? i have never done this before so i am hopeing i dont make a balls of it and mess it rite up. thanks alot

[cad600]

It really is as straight forward as unbolt one, drop it out, lift the other one in, and bolt it together.

Here are the areas to look out for.:
1) The air box will not fit under the FZR tank cover. It won't fit between the frame for that matter. You need to cut material from it to get it on or run pods. Usually people just seal it back up with "duck tape" and use a YZF fuel tank. By the way, you have to use the Foxeye air box, not the Thundercat.
2) The FZR wiring and CDI will not work, you need the YZF items.
3) To my knowledge, the YZF header will not work. It has to do with the location of the collector hitting the shock linkage.

The first time takes a little while. But the best order is to remove the engine cradles, get a jack under the engine, remove the two rear bolts, then move the engine forward and down to get it out. Of course you need to have the radiator and carbs out of the way first.

Good luck.

[fzrwayne]

It really is as straight forward as unbolt one, drop it out, lift the other one in, and bolt it together.

Here are the areas to look out for.:
1) The air box will not fit under the FZR tank cover. It won't fit between the frame for that matter. You need to cut material from it to get it on or run pods. Usually people just seal it back up with "duck tape" and use a YZF fuel tank. By the way, you have to use the Foxeye air box, not the Thundercat.
2) The FZR wiring and CDI will not work, you need the YZF items.
3) To my knowledge, the YZF header will not work. It has to do with the location of the collector hitting the shock linkage.

The first time takes a little while. But the best order is to remove the engine cradles, get a jack under the engine, remove the two rear bolts, then move the engine forward and down to get it out. Of course you need to have the radiator and carbs out of the way first.

Good luck.

bril cheers cad. so hopefuly it will be as easy as u have just said. drop 1 out and lift the other in. sorted. thanks

[RoadDogma]

You will want to run FZR headers. The YZF headers will not come out at the proper angle.

[fzrwayne]

You will want to run FZR headers. The YZF headers will not come out at the proper angle.

dogma will thay fit into the head on the 600 engine? thanks

[cad600]

I'm running FZR headers with my YZF engine.

[RoadDogma]

dogma will thay fit into the head on the 600 engine? thanks

The YZF headers will bolt to the head. However, the motor in the YZF600 is mounted in a more "upright" position than in the FZR.
Therefore, the bends in the YZF header tube are at such an angle that the mid-pipe will point much higher, when installed. I have a YZF pipe on an FZR400RR (3TJ) which has the motor mounted at the same angle as the YZF. I tried installing an FZR400 and 600 pipe on that bike and the header tubes came out pointing towards the ground. I haven't actually tried to install the YZF pipe on my FZR400 (1WG), but given the above described experience, I would imagine the YZF pipe would foul on the shock mount or engine cradle. I have also heard that the YZF headers will not fit under the FZR fairings. Thats why I sourced an FZR600 pipe for my FZR4/YZF600 hybrid.