[nmcam12345]

hello to all you suzuki motox tech !
i have a 250 .rm 2 stroke .. i changed the sp.plug .and air filtter and gear oil... the bike has a full fmf fatty pipe with a fmf back boxs
it kicks or all the time but runs crap! it feels like theres zero powerband ..i need help .. im running it at 40/1 retio i just like to get this thing fixed as my m8 cr runs like a rocket !!!!! mine runs like crap

 

[EastCoastMotion]

WHOA 40:1 Ratio?!?! seems a bit high if you ask me.....try leaning out the oil a bit and see what happens, i run 32:1 with 93 octane....u might also want to get a compression check done to see if your top end is all in good shape

 

[nmcam12345]

thanks m8 for fast reply i tryed 32/1 when i got the bike 2weeks ago but itwas then same .. but i havent tryed the compersson test what does that doo ? top end /// bottom end what all this im a new biker but i can ride a bike its all new to mee lol

 

[EastCoastMotion]

It checks to make sure that your motor is at the proper compression rate. If the compression inside the motor is down, your going to lose all of your power, which is whats happening in your case......does the bike turn over real easy or does it take a few kicks to get it going?

 

[EastCoastMotion]

Top end is like you piston and rings and reeds, bottom end is you crank, transmission etc.

 

[nmcam12345]

it kicks over furst time all the time i never have any porbs kickin it over only when i fall off it a bugger

 

[EastCoastMotion]

hmm...id take it to a shop or someone who knows how to run a compression test to see whats going on........are there any mods to the fuel system or anything like that?

 

[nmcam12345]

hmm...id take it to a shop or someone who knows how to run a compression test to see whats going on........are there any mods to the fuel system or anything like that?

hmm you lost me there mods like what name some and ill try it ????

 

[EastCoastMotion]

is there a different carb. than the stock one....or are there different jets in the carb?

 

[nmcam12345]

is there a different carb. than the stock one....or are there different jets in the carb?

hmmm thats sound good but i was lookin on the website at fmf carb jettin to suite this full pipe set up but i dont know what i got in my bike i looked at them but the number on the needle was i bit worn out this what its got on the site fmf fatty spec for a carb
SUZUKI --> 2001 --> RM250





Jetting Information
Main Jet: 158
Pilot Jet: 48
Needle: STOCK
Needle Position: 2ND
Power Jet: N/A
Air Screw: 1.5
Fuel Screw: N/A
but im not sure what i have in my bike i think this is my next misson to doo lol ?!

 

[EastCoastMotion]

ahh ok well if you have the stock jets than that isnt the problem....yeah if fmf says thats the way it should be set up then by all means set it up like that (they def know ALOT more than i do) and if that doesnt solve your power loss problem id look into getting a compression test on the bike

 

[nmcam12345]

thanks for your info bud ill keep you posted soon as! if anybody els has other infos pls pm thanks once again eastcostmotion !!!

 

[EastCoastMotion]

no prob man good luck! :smile:

 

[robeych]

Try rebuilding the carburetor. Check for air leaks around the carburetor, exhaust, and intake. When you state the bike is performing poorly, under what conditions are you referring to? Is it top end, low end, all around? At idle? Your bike has a power valve, so a good synthetic oil at 32:1 is recommended. Good Luck.

 

[nmcam12345]

Try rebuilding the carburetor. Check for air leaks around the carburetor, exhaust, and intake. When you state the bike is performing poorly, under what conditions are you referring to? Is it top end, low end, all around? At idle? Your bike has a power valve, so a good synthetic oil at 32:1 is recommended. Good Luck.

top end /low end and all around at idle ? you lost me on that one i use 40/1 ratio and good synthetic oil all i can tell is its kicks over fine when i do the throttle it dont seem to go in powerband at high rev ... just askin cos my m8 cr is a rocket and mine bike is slow

 

[digipoi]

Just replaced the rings on my 04rm250 and cleaned out the power valve. Runs alot better now. I changed synthetic oil brands to one that allows me to run 65:1 mixture. Id say check your rings, replace your jets to new ones (they may be glassed)and rejet to what FMF recommends, and thoroughly clean your carb. Also, check your reeds for wear. Sounds to me that bike needs some good ol maintenance.

 

[navinbhat]

I may be shooting in the dark here. But when you say 'NO POWER'.. does it rev a lot and gets nowhere ? Possibly worn out clutch plates. also, not sure about the year... but if it has power/exhaust valves then might be worth removing and cleaning then and make sure they are well oiled.