whats wrong with my bike?

[shitbits80]

ive got new cr 125 and i run it in and all that stuff but the bike keeps on foulen up my spark plugs.it happened a few times when i was runnin it in .i was expecten that,after i run it in on nthe first tank i did a service on it drained all the petrol changed the oil but it still fouls the spark plugs.now its starten to get full annoying.if any 1 noes anything abomut it can u wb or pm me. thanks dudes

[deathtroop666]

do you allways ride flat out? if not try using a hotter spark plug(it will burn the oil better)

[sexy_az]

or maybe you are running a bit ritch (too much oil)

[one_industries]

yeah what type plug are you running a number 9, get your plug out and tell us like the name or somthing, i had the same problem so i whent and got a hotter plug

[yamaha_54]

wat fuel oil mix are u using eg 30:1? wen my mates little brother got his 04 cr85 it was doing that all he did was take it back 2 the shop and get it jetted leaner.

[redbull_fmx]

try running a ngk idrium plug u got one and rode a full day putting around and neev fouled

[Lee_250f]

what kind of plug u got. just a warning if any of u dont no but never run a champion plu in a 2stk. the mechanic that services my bike sais he has had 3people come in in a month because there plug has MELTED a bit on the end and dropped off into the bore and totally screwed the bore and piston and one guys botoom end so beware.

[[TOPGEAR]]

it could of been a problem when running in.

u might of mixed it too rich and it fouled when running in, of corse u cant go flat out when running it in.

what spark plug are you using ?? and what brand of oil and all that shit ??

do u have to rejet brand new bikes ?

[JAYKAY]

yeah i reckon your running a bit rich what ratio are you running and also how hard are you riding

[shitbits80]

hey
i dont know what spark plug i was runnin but dad just bought me 4 ngk br9es or something like that and the guy sed if all of them fouled up i need to take it in to the shop and get it rejetted

yeh ive been riding it pretty hard and i use motol 800 oil 4 it...at 22:1 ...but thanks heaps 4 ur help ill tell u if it works

[DirtCowboy]

I not dead certain on the cr but when i had my kx i was running it at 35:1 so i dont know but i have a suspcion that it may be running rich but talk to your bike shop about the recommend fuel mix for your bike and find out the standard jetting and the jet that they would recommend for your area as the settings need to be changed to suit the area (affected by the height above ocean)

[troop_353]

yer have u changed your plug since it been run in because once the foul a few times they can keep doin it coz it happened to mine and once i put in new plug it was sweet hope that helps

[ALLEN]

holy shit!your runnin that thing way to rich.22:1 is about 245 mls of oil to 5 litres.try 33:1 which 152 mls of oil to 5 litres.

[JAYKAY]

yeah i reckon thats so rich but you are supposed to run them rich when running them in

[[TOPGEAR]]

22:1 ??

that is like 450ml to 10 litres, that is shitloads and is way too much. back it off to 32:1

[DirtCowboy]

even if you wanna be on the safe side i reackon run it at 30:1 till its run in

[shitbits80]

no no no i must have made a mistake becose i put 120 mls of oil in 5 literes of peterol and ive gone through something like 7 spark plugs

[[TOPGEAR]]

i would say ur bike is ****ed then lol. 125ml per 5 litre is 40:1

your rings might be stuffed, how much compression have you got ?

[[TOPGEAR]]

dd

[METAL_MULISHA13]

i use 40:1 in my '02 CR80, and it runs perfect, no probs at all:D

ive actually got a stickler liek that on my fuel can in case i forger my ratio, i jsut look on the sticker and it says 40:1 with a black texta mark on it:)

[Robbo66]

get a NGK BR8ES. (instead of a 9).

try changing your oil brand before putting it into the shop.
almost all CR models come with a cold spark plug. i recommend getting the hotter one first.

[[TOPGEAR]]

yeh, the br8es kicks ass, it gives it a bit more power too.

when i got my yz it had a br9egv in it, then i stuck a br8es and it flew :p

[one_industries]

yeah i got a br8es as well mine had those problems so i just went down a plug from a br9egv

[I_Bleed_blue]

same thing is happening 2 me i got my bike last saturday its a YZ85
get a hotter plug it worked 4 me

[Yammi_man]

yeah im runnin a br9es and runs great, cos i was fouling plugs when i got me bike to, dood it could be also the fuel ya using i know some fuel ***es ya plugs, there is such a thing as bad fuel, can *** cars injectors and other things as well as its bad for ya plugs in ya bike and u should try running vortex, or premium unledded if ya not already

[Mungoman45]

"She Takes Premium Dude....PREEEEEEEEEEEEEEMIUM!"..

the normal old unleaded you buy, especially and more so if it is stored for periods of time is plain crap. It can make your biike hard to start if you dont use it on a regular basis. It can make it foul spark plugs even if it is a four stroke, it can make it run lean to the extent it will do motor damage and it can make it overheat. If your lucky, some bikes, will run fine on unleaded, bit will perform better on the higher octaine premium unleaded fuels, and this applies to all stationery motors, chain-saws and whatever else that runs on petrol. I've even heard cases of car engines getting damaged from poor quality unleaded.

The reason is the lower octane a fuel is, the leaner, and hence, hotter a motor will run, ofcourse, if you dont use the bike for a while,you may have to lie it on it's side, drain the carby to put fresh fuel in the bowl to make it start.
Going to the other extreme, even above premium unleaded, Av Gas would make the bike run cooler, make it run richer, and give it more power. Atleast premium unleaded as a minium is the way to go. DO NOT use Shell Optimax

[[TOPGEAR]]

i run mine on unleaded, only cause i get it free. occasionally i run premium.

my bike starts first kick every kick, and never fould a plug. i run a br8es

[Lee_250f]

im run mine 96 cr125 on unleaded and it hooks. wats the shell optimax mm45? unleaded normal shit? how come not to use it?

[[TOPGEAR]]

it premium unleaded and its ****ed up shit.

[troop of doom]

i have a iridium tip in my bike and i use vortex and nothing but vortex ow and yer that shell shit is ****ed up stuff

[fmx_freak]

i use premium unleaded and i run my bike at 40:1 with motul 800 and it runs great ahh its a 03 yz125

[[TOPGEAR]]

**** iridiums, not worth it. i ran on in my 125. first ride it fouled.

[YamahasRsweet]

i got an iridium in my 03 yz 125 and its sweet as

[Mungoman45]

Yes Shell Optimax is an Unleaded fuel, it is a very high density/octaine fuel that is designed for performance engines that have fuel injection, that can be adjusted to suit.
MotoX bikes these days, as we all know, do not have fuel injection (yet ;)), and therefor, will not run well on optimax without extensive engine tuning and changes, such as jetting, carby needles and sparkplugs, and even with those changes, will still not be as precise as fuel injection.
There is much more risk of running way too rich. with Optimax because of it's high density is more likely to cause overheating.....or as far as my understanding goes....

[troop of doom]

yer munog i have fouled 6 of em loli get em heaps cheap but liek 5 bucks each

[Yammi_man]

na have to disagree mungo ive heard from at least 4 bike shops and all me mates that ride reckon optimax is better, without extensive engine tuning or changes. it runs cleaner, its better for ya bike and you seem to get more out of a tank too, oh well in the end fuel is fuel i suppose...

[Yammi_man]

eyy, guess what, well its 130 in the morning and i just finished work... sorry mungo... yeah DO NOT USE SHELL OPTIMAX!! go vortex or premium. sorry mate im half asleep and mis-red something :)

[fmx_freak]

what about AVGAS?
whats peoples opinions about it i no its banned in races but who still uses it

[Yammi_man]

u gotta be seriously stupid or seriously a good damn rider to be using avgas, its like ya bike on NOS in otherwords

[Rosie125]

AVGAS is like the biggest boost 4 ur bike, i wouldnt recomend using it all the time, once in a while mabey, a mate of mine chucked it in my nephews 50 and i think it made the bike go all weird

[swapper]

Avgas is just a higher quality fuel (higher octane) Doesnt really make the bike run any quicker, it just makes your bike run cooler and cleaner

[zach4161]

yeah,and if you get to hot of a plug it will burn a hole in the piston...dont want that do ya