More 250r Questions

[mxmike17]

What spark plugs work with these moters?

What premix ratio is recomended?


Sorry if some of these questions sound elementry but I honestly dont know and want to be shure.

[Roostin250R]

NGK BR8ES is a good all around plug to use and 32:1 pre-mix works well. If you run one of the full synthetic oils you can probably get by with 40 or 50:1

[wilkin250r]

Most people I know run either 32:1 or 40:1. Some people get brave and run 50:1 or even as little as 75:1 :eek:

To be on the safe side, I'd reccomend 32:1.

[stocktires]

got pics of the bike mike? Who did you buy it from (if you don't mind me asking)?

[beak7707]

Just be sure to use a high quality 2 stroke oil. I would also recommend 32:1.

[mxmike17]

How about maxama super M full synthetic. That what I run in our mod 50 mini quad and it seems to do good.

[mxmike17]

Whats been up stocktires? I will post some pics over the weekend. I got it from Haydug from this site and Cannondale riders. I believe brad77 was the original owner. So far im likeing it:D LSR alum fram and roll design front and rear. Im gona go give it a shot in pervace Saturday night, should be fun:macho

[beak7707]

I've always ran maxiam 927 and had real good luck with it.

[velocityatv]

USE A B8EV NGK PLUG THEY SEEM TO BE MORE FOUL RESISTANT. I USE AMSOIL FULL SYN @ 50:1 SOUNDS CRAZY BUT IT PROTECTS AWSOME. YA THE STUFFS A LITTLE PRICEY BUT YA CAN'T BEAT THE SMELL OF HIGH OCTANE AND AMSOIL:p

[mxmike17]

Can any of you tell me what carb I got? pwk? a/s? Keep it?
Im going to bring it to work tomorow an put a micrometer on it and see what mm it is. I need to get a float bowl gasket and pick up some jets. Thanks for all the help already


http://www.imagestation.com/picture/sraid134/pe4c9cfb89c07dd4176997b6f072f3db7/f7733ed2.jpg

http://www.imagestation.com/picture/sraid134/pb873d1bbc48e6369813959499f22e6c3/f7733ec6.jpg

[mxmike17]

I went and shot a quick pic.......... Better ones to come:)

http://www.imagestation.com/picture/sraid134/p88cb037ce1837fcec389a319af8ddf3a/f7732b87.jpg

[stocktires]

Just been trying to sell my bike. Headed to Loretta's tomorrow
An Air striker IS a pwk. Take the numbers to a local honda shop or somewhere and get them to check it.
Awesome bike! I dream of that chassis!
I run Maxima 927 32:1 and love it. Runnng a BR8EG also

[jokerman_28]

Originally posted by velocityatv
USE A B8EV NGK PLUG THEY SEEM TO BE MORE FOUL RESISTANT. I USE AMSOIL FULL SYN @ 50:1 SOUNDS CRAZY BUT IT PROTECTS AWSOME. YA THE STUFFS A LITTLE PRICEY BUT YA CAN'T BEAT THE SMELL OF HIGH OCTANE AND AMSOIL:p

couldn't agree more. i run 110 octane turbo blue with 40:1 amsoil. i went with 40:1 just cause it was easiest to dump half the bottle in a 5 gallon jugs. keeps the inside of the motor looking beautiful and smells awesome.

[1988R]

You can take the numbers off the carb then go to:
www.keihin-us.com/index


there is an area where you can input those numbers and it will tell you what you have

[1988R]

Forget that idea I can't find it on there now. I know there was an area to do that cause I did it to find the size of my carb
Oh well I tried

[lil400exman]

i run amsoil full synthetic 50:1 2000 series. best stuff. besides it makes your gas blood red!:macho also i use a splitfire plug. cant think of the part number but they work real nice for me. to me your carb looks like a pj:confused:

[lil400exman]

Originally posted by lil400exman
i run amsoil full synthetic 50:1 2000 series. best stuff. besides it makes your gas blood red!:macho also i use a splitfire plug. cant think of the part number but they work real nice for me. to me your carb looks like a pj:confused:
i take that back. IT IS A PJ. the pj series carb had the idle/choke in on one jet! also the slide like that is tell tale. by the way the bike looks sweet! :devil:

[lil400exman]

its a 34mm fyi

[mxmike17]

Thanks,I think you hit the nail on the head.

It has a PJ stamped on it and I went to the site that 1988r posted and went to the pj carb specs and I just measured every thing and it all matches the 34mm dimentions listed on that site.
Only thing that gets me is the slide measured at 36mm.

Next question is is this a decent carb for the 250r?

[lil400exman]

Originally posted by mxmike17
Thanks,I think you hit the nail on the head.

It has a PJ stamped on it and I went to the site that 1988r posted and went to the pj carb specs and I just measured every thing and it all matches the 34mm dimentions listed on that site.
Only thing that gets me is the slide measured at 36mm.

Next question is is this a decent carb for the 250r?

ehh after 14-16 years the carb tends to get worn. ever with a rebuild they just lose "newness" and dont become as reliable or stay in tune as well. luckily mine isnt doing that but i have a 36 mm airstryker that i can put on if need be. after 15 years though carb advancemnt has come along way and a newer carb would bring things up to speed in fuel delivery especially with a port or other engine flow parts. if you mostly ride woods or stay in the low to mid range then i reccomend a 34-36 mm carb. now if you do msotly a high end riding a larger carb would help. see with a larger carb you lose your air velocity so throttle response suffers. with a smaller carb the air has more velocity in it so it has a quicker reaction time from the push of the throttle to revving. you might want to look at i think its a 98 cr 250 carb is a cheaper replacement but im not 100% let me call my engine builder to see........ :macho if you have any other questions about a R just pm me and i will be glad to assist ya!

[DPR250R]

You would want to get the stock carb off of a 2000 CR250. That year it came with a 38mm PWK with NO electronics.

After that Honda made the switch to a Mikuni TMX and some people have trouble setting them up correctly.

[02blazerx]

ok this doesnt have to do do with carbs or premix ratio or anything but i was curious if a swinger off an 86 atc 250r will work on a 1989 250r frame.. and what about the motor mounts they changed in 88 and 89.. on the 86-87 they had the mounts on the swing arm bolt but changed it.... im just curious because im building a 250r and my last peice is the frame lol i can get an 89 frame but if it wont work with my swinger i dont wanna waste 350 bucks ya know?

thanks Joe

[1988R]

the easiest thig to do is get a frame/swinger of the same year but I believe an 88-89 frame w/86-87 swinger will work as long as you get/make a space to go inbetween the center to keep the bearings/caps in place.if you have the mounts for an 86-87 (engine that is) and cut the ears off it should work fine,then by all means get the frame. If you don't want no fab work and already have a 86-87 swinger then waite for an 86-87 frame ,their more common then an 88-89 frame

[02blazerx]

thanks man i still have the engine mounts that came off the 3 wheeler so i can use it as a spacer.. thanks alot man

Operation R is a go!! hehe.. 2 weeks and shes done