CR250 needing to run race fuel?

[honda_power]

Im looking to buy a low hours good condition CR250 from a mate of a mate.

Iv read up on the net, and the 05-7's seem to have trouble with 'pinging' [whatever the hell that is] and jetting.

Seems the only fix is to run race fuel or 'retard the ignition' [what does that involve?].

I havnt acually talked to him about what fuel it runs etc yet, but how common is this problem, and is it an easy fix? I dont wanna have to run race fuel or jet it all the time [i dont even know how]. The whole point of going to 2 stroke is for a break on the maintanace side... seems these are more trouble than the bloody 4 strokes. Is 96-98 fuel enough?

I know some of you said to stear clear of the CRs, but iv ridden hondas for the last 5 years or so, plus this CR is a bargan, and its kind of hard to ignore in search of a good YZ.

Chur

[B0000M]

if you run 91 you will eat pistons and cylinders. if you run 95 you will hear the odd ping, if you run 98 they are sweet as.

as for jetting, im running a fatty pipe, shorty muffler, boyesen reeds, jetting is standard apart from the main being a 430 and it runs good as, never fouled a plug, no excess smoke, no oil spooge in the muffler - couldnt be happier with it

[honda_power]

if you run 91 you will eat pistons and cylinders. if you run 95 you will hear the odd ping, if you run 98 they are sweet as.

as for jetting, im running a fatty pipe, shorty muffler, boyesen reeds, jetting is standard apart from the main being a 430 and it runs good as, never fouled a plug, no excess smoke, no oil spooge in the muffler - couldnt be happier with it


thanks mate. i am a bit worried about the cylinder though. Suppose something does go wrong... what would the total damage bill be? Its just that im gonna be a student once again for a year and im not too keen on having huge un-expected bills popping up.

[B0000M]

you'll hear it long before you fuck it.

basiclly if it sounds like the motor is rattling like fuck under hard acceleration, your doing damage. put it this way, my bikes done nearly 170 hours, cylinder still looks like new with the hone marks, ive only seen one eat itself and it was being raced, and was running 91 fuel - actually it was an 04 as well

[honda_power]

you'll hear it long before you fuck it.

basiclly if it sounds like the motor is rattling like fuck under hard acceleration, your doing damage. put it this way, my bikes done nearly 170 hours, cylinder still looks like new with the hone marks, ive only seen one eat itself and it was being raced, and was running 91 fuel - actually it was an 04 as well

ok sweet thats what i wanted to hear :). I best go have a look at this thing then. Anything I should look out for? its an 06

[jt119]

ive got ann 04 and it seems alot better on 98 than 91

[B0000M]

nothing in particular i can think of to look for, just make sure everythign works as it should, check play in the suspension bushes, chain, sprockets, compression compared to others, how it goes when you ride it, straight brake discs, pad condition, suspensions smooth action / not noisy, condition of radiators.. just the usual stuff.

if it doesnt have one allready, get youself a fmf fatty and shorty, they make the bike.

[Brian d marge]

By crickey ,,that 91 of yours must be dodgy I run my crs on Japanese 91 ...tis what they are designed for ,, with no props what so ever , no sign of detonation

what they watering that stuff down with ,,,, :shit:

Stephen

[scott411]

yes our pump fuel is very average, and rated different to most of the world, ,
race fue/av gasl blended 50/50 with 91 is what i reccomend for serious racing on 2 strokes, you can normally jet out the denotation for trail riding and light mx use,

[warewolf]

yes our pump fuel is very average, and rated different to most of the worldFor the curious amongst us, please explain?

AFAIK fuel here is rated as RON like UK/Europe, as distinct from the US system of (MON+RON)/2 which results in a lower number for the same stuff.

[cheese]

I always just run 98 in my CR. Its like $2 per tank different so no big deal. Just a bit stink when the fuel goes stale..... LOL

[barty5]

I always just run 98 in my CR. Its like $2 per tank different so no big deal. Just a bit stink when the fuel goes stale..... LOL

yours would be bout 89octane by now wouldnt it :Pokey:

[B0000M]

how many hours have you done since tarawera cheese?

[cheese]

20 or so....

[barty5]

how many hours have you done since tarawera cheese? now thats fuckin funny:clap::clap:

[B0000M]

20 or so....

including tarawera 100 itself? lol

[barty5]

including tarawera 100 itself? lol

Nah been talkin to rupe we think he has been running it in his garage to wind up the hours.:laugh:

[B0000M]

Nah been talkin to rupe we think he has been running it in his garage to wind up the hours.:laugh:

probably stuck the hour meter on his work car for 2 days sitting in traffic to andfrom work to clock up those 20 hours :Pokey:

[barty5]

well anything is posible he's a sneaky bugger

[cheese]

LOL you bastards!

[honda_power]

haha, all you gotta do is mention the word fuel and everyone starts taking the piss out of everyone else

[B0000M]

haha, all you gotta do is mention anything and everyone starts taking the piss out of cheese

edited for correctness

[mattwood]

hahaaa, its funny because its true :jerry:

[cheese]

you funny cunts!

[Pierce]

I ride an 05 CR250 and run 98 on standard jetting it seems sweet, did get a bit of pinging but i did a piston and rings on it and that has pretty much dissappeared since the fresh piston and rings.

I got an FMF shorty and FMF Gnarly which made a huge difference to the bottom end and smoothened the powerband out.

[jt119]

need somthing like that on mine its got no bottom end

[cheese]

I;ve got a flywheel weight for a CR if anyone wants it $100. Drops straigt into a 01 verison, you have to mod the case a bit to get it into a 02 onwards.

[Pierce]

I;ve got a flywheel weight for a CR if anyone wants it $100. Drops straigt into a 01 verison, you have to mod the case a bit to get it into a 02 onwards.

I've got a 10lbs weight for CR250 too. Bolts straight for more bottom end and smoother power delievery:shit: I want $130 for mine tho. It's brand new in package:confused:

[B0000M]

I've got a 10lbs weight for CR250 too. Bolts straight for more bottom end and smoother power delievery:shit: I want $130 for mine tho. It's brand new in package:confused:

does it go straight on? cheese;s didnt