What oil are you using? I had issues with plugs giving up when running fully synthetic.

If the reeds are damaged (that's what's between the carbs and the engine) then that can make it hard to start.

Welcome to the site. The standard AR seat height is 895mm according to the info here: http://www.honda.co.jp/factbook/motor/CRM250AR/199701/crm97-015.html So the AR is fractionally taller than the others. The CR forks are longer but I'm not sure by how much. Dropping the forks through the yokes will...

Okay, looking at the LT wiring diagram with a magnifying glass and asking wifey to translate from Japanese... Kill switch connects to: black (it's a 12v feed switched by the ignition) black/white (goes to CDI which works when it gets 12v) Brake Light Switch connects to: black (12v feed - shared with...

The real AR standard carb specs...

Main Jet is 148
Pilot Jet is 48
Needle is fixed (no clip to adjust)
Air Screw 1 3/4 turns out
Float Height 16mm

Found the cap. It was an MTX one and is knackered. It's got road rash on it and the vent pipe is very loose. Looks like it's off a bike that's been somersaulted. However, I can now confirm that an MTX fuel cap will fit perfectly.

I may have a suitable non-locking fuel cap with a breather in my garage. I'll have a look over the next day or two.

For original ones, you can get them from LeisureTrail - http://www.leisuretrail.co.uk/ but they are not cheap.

Good choice of bike - and don't let anyone tell you otherwise :)

Excellent link. At last a parts book and workshop manual :)

Just need a rack and then I'm sorted :)

Was the tuning manual this one:

http://shop.lindbergh.co.jp/cgi-bin/e/s ... ?code=9017

Have you got a honda part number for the workshop manual?

What a bargain. It's only £468.05 at todays exchange rate. Group buy anyone ;)

Actually - just noticed this is an ancient resurrected thread. Maybe they have sold out by now. Arse!

As you open the throttle, if the marks line up and it overshoots by 2mm, that's too much oil. If it doesn't line up at any point, and stops 2mm before it lines up, that's not enough oil.

I thought 3bhp would be a more likely figure. It's not just the bearing losses, it's a counterweight flailing around inside the case and also gear friction losses where it meshes on the primary drive gear (I presume that's where it's driven anyway).

One of my friends did this to his AR a few years ago when he had one. He did the work himself so it just cost time, gaskets and consumables. This is what he said about it: The mod's worth around 5 bhp and the bike feels noticeably quicker and more responsive - but it is vibey. The vibes aren't too b...

Just sent you an AR wiring diagram with colours (it's in black and white but has the abbreviations on it).