I've bloody done it now! (Bought a Honda)

[Ride it till the red]

Ok so today was the test, went for a quick ride up the forest.

Rides nice, the seat being cut down makes a big difference I think. Made me stand alot more which is obviously a good thing.

Needs bottom shock mount bush done, and even more importantly the fork seals - ASAP! Will clean disc and replace front pads after this and hopefully that will sort out the lack of powerful braking.

Front wasn't very confidence inspiring, lack of perfection in not only forks but brake and a bit too much air is my explanation for now.

Power was in no way an issue, it hauls along quite nicely! Comes on smooth with no major hit to speak of, a great low and mid power curve letting me flick the front over obstacles with ease from low rpm. Clutch and box both seem good. Gear shift is high compared to what I'm used to but it's perfect for hooking the next gear and not too hard to chop back down and of course can be fiddled with.

So it will be going to the shop next week for fork seals and shock mount bush. I'll grab some brake pads and chuck those at it as well as a rear guard to keep my back slightly cleaner.

Now here's my issue - Detonation?!? Is it? Isn't it? If it is then how do I fix it? If it isn't then whats the slight clacking that I sometimes heard normally at low rpm when coming from off throttle to on it? I'm pretty sure I can hear the afore mentioned rattling under acceleration at some stages. The gas I had in it was 98 that I premixed a month ago now so getting a bit old and possibly the only reason? I'll be doing a bit of a search on jetting now to see if I need to play with that? I'm assuming it's standard at this stage so would I be correct in thinking it's best left that way?

Now I'm flicking through brouchures ticking things it could do with, every bike needs a lil bling! (even a honda )

[Danger]

Now here's my issue - Detonation?!? Is it? Isn't it? If it is then how do I fix it? If it isn't then whats the slight clacking that I sometimes heard normally at low rpm when coming from off throttle to on it? I'm pretty sure I can hear the afore mentioned rattling under acceleration at some stages. The gas I had in it was 98 that I premixed a month ago now so getting a bit old and possibly the only reason? I'll be doing a bit of a search on jetting now to see if I need to play with that? I'm assuming it's standard at this stage so would I be correct in thinking it's best left that way?

Yes it is and good luck, I would have warned you about this if you had given some notice, these bikes are very tricky to jet with any degree of satisfaction, Honda had given up on the two stroke and never sorted this model out and they seem to run rich and detonate at the same time.

I may have posted some specs on this bike so a search might bring something up, but I was never happy with the jetting on one of these despite spending a bit of time trying to get it right.

Firstly try retarding the timing about an 1/8" or a coin width and then start on the jetting.

[Danger]

Here you go, a quick search brought these two threads up, I know there is more as well.

http://www.kiwibiker.co.nz/forums/sh...=CR250+jetting

http://www.kiwibiker.co.nz/forums/sh...=CR250+jetting

[B0000M]

mine is the only one ive ever heard detonate, and ive ridden a few.

apparently though the reason mine was detonating was due to having the wrong spark plug - it had a BR9 in it, and apparently should have an 8. i am yet to test it with the 8. it had a 9 in it when i got it, and i replaced it with a 9 last time. that said, i wear spark plugs out, not fuck them due to fouling.

the detonating you should only hear under acceleration if its happening at all.

these bikes seem to get a lot of bad press from everyone who hasnt owned one for supposed jetting issues, none of which im aware of in a first hand sence, and i have 5 mates with them or that have had them recently.

[Ride it till the red]

Cheers Danger much appreciated!

I hate thinking about things like this whilst riding as it makes me paranoid about every little sound I think I can hear....

Am I right in thinking the detonation is related to running lean? And could possibly be fiixed by adjusting the air screw to make it a bit richer?

Now I remember why I love my RM, it's trouble free!

When I get the rest sorted I'll have to see whats possible

[kezzafish]

shit i hope you got it for cheap mate!

[Ride it till the red]

Wouldn't have bought it otherwise mate.... Cheapest 05 I could see on T Me was 4.5k and this one will come in happily under that once I've sorted suspension, pads, rear guard and sorted out this jetting plus a fresh top end (not that it needs it yet). With any luck the detonation shouldn't be too hard to get past and I should have a sweet little bike to play on

[cheese]

THe CRs can sound noisy and its the power valve moving.

Pop the cover off teh power valve and check teh cables. its common for them to break about now on your one.