Swingarm

[Bad Ass Honda 250r]

will the 88-89 swingarm bolt right up to the 86 250rs, i heard they are lighter and i want to make my quad lighter.

[all250r]

You can probably do a search and find the answer to this. I'll answer it though. The 88-89 swingarm doesn't have a means to mount the motor mount bracket, so you lose those two mounting points for the engine. It's probably not acceptable to do that, but to be specific about your question, yes the swingarm should mount.

If you want to support the engine in the rear, one option is to weld a 88-89 frame style cross member in the back with mounting tabs.

[ERBE]

They are now mounting TRX450 swingers on, there Alum and are 1" shorter than the 86/87

[88mxR]

Are there any other modifications needed to run a 450r swing arm? My brother cracked his 86er in several places and is looking for a cheap, stronger one. If he could run his stock linkage and shock, that would be great.