CRF250 L thread

[micksea]

Deleted

spit it out man :woohoo:

[motorbike]

i have now watched and read a lot of info on these bikes,,,but can anyone tell me..if you just change the exhaust only(no header pipe no air box alteration) for say a fmf quiet 4 one do you still need to fit electronic fuel adjustment box...would like to think i could reduce the weight and slightly increase the performance without major expence or damaging the bike...ps i dont own one but am thinking ahead

I've fitted the Yoshimura full system on mine, haven't seen the need to mod the airbox or fit a fuel controller. Bike hasn't been running hot.

To be fully up front I am having some trouble with mine, still riding it but now erring towards either a coil issue or HT lead playing up (almost 30 000 miles now) ......but maintenance is very straightforward & service intervals are impressively long.


I find it a very fun bike to ride, on the road with street tyres it is effortless playing with traffic. For circa £4000 brand new, there's not much else out there that can touch it (thumbs)

But did you not blow up your previous engine with that combo?....think i may get a crf when i return from a upcoming holiday...there are a few year 16 bikes with well under 1k miles for sale around £3250 and that's from dealers.... :woohoo:

[garyboy]

yes, there seems to be some great deals around on these.
I always used to buy private but there was always something wrong, or worn, with no warranty or comeback, so now I go `dealer` (and finance :whistle: ) (thumbs) but hopefully not again for a while B)

[tho tbh there are substantial savings on cash deals, private.]


engine: it seems best to either // leave stock, //or go the whole hog conversion, air, jets, exhaust and controller thingy ? :huh:

[robson]

Do these bikes have a lambda sensor?--if so then they will fuel up a bit when the engine breathes a bit better--but within the limits of the standard mapping--the lambda sensors typically control idle and warm up so I would expect it to be slightly more lively at the bottom end. I don't own one so I'm just interested in "tuning" mods and results.

they do, just plugged it and will be testing tomorrow.It helped my xt so maybe will crf too.

[minkyhead]

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[motorbike]

ok then if i just fit a quietish slip on fmf 4 on the end then no harm done no other alteration required to keep bike in good fettle

[minkyhead]

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[robson]

OK, I rode a bit without o2 sensor. Unfortunately I didn't noticed any noticeable improvements except occasional pop from the pipe Possibly a little less engine braking too.

Looks like small cc bikes don't have to be so much restricted to pass emission tests like bigger bikes. Anyway I am reconnecting this sensor back.

[Birdie]

When green laning what tyre pressures are best :laugh:

[cowling]

When green laning what tyre pressures are best :laugh:

I always run them with at least 25psi , you sacrifice a bit traction, but the only
Puncher I have ever had in 8000 miles, much off road included ,is one muddy
Day I decided to drop to 18psi for better grip, didn't really notice much difference
But I ended up with a pinch puncture of hitting a rock to hard.

I'm running std set up with no rim locks.

Pirelli mt21 on the front and Mitas e09 on the rear is what I run, it's a great
Duel purpose combination, and came recommended from the ABC lot.