big bore kit for 87 kx250?

[diesel-mech]

Does any one know if any company makes a big bore kit for an older (1987) kx 250 engine? This is the new power plant for my 87tecate4. I wanted to go newer(2001 or so) but my dad bought the whole kx for $100.00 so I can't argue. I told ya he is more excited about the tecate than I am!!! what do you say to a 52 year old KAW-BOY? Gotta love him...He's my Dad
Any way I've had work done by L.A. sleeve and I was totally impressed. Are there any other good companies I should contact?

[cdalejef]

Ya, there are several available. How big you wanna go?

[diesel-mech]

I hadn't thought about how big to go. I want an awsome bottom end and mid range, I only ride in the top end when I'm on a track(and thats not real often!) the kicker is it has to run on PUMP GAS I'm tired of triing to find race gas when the local bike shop is out.
I guess about a 330cc but thats open to my options. Can you tell me some places to contact?

:confused:

[cdalejef]

I wouldn't go that big, your already going to have major vibration problems, a 330 kit will make it worse! Just bore it enough to clean up the cylinder.


You wouldn't wanna trade a kit for a Garret ball bearing turbo would ya? :D

[diesel-mech]

:confused: Vibration problems??? because I'm using a kx engine on a quad? If you have a big bore kit installed it doesn't get balanced? fill me in This is new territory for me

[cdalejef]

the KX engine has no counter ballancer like a quad motor. For some reason the vibration gets amplified in quad frames.


Now how about that turbo :D (97 Powerstroke):D

[diesel-mech]

Yah I had here that! what if I found a tecate engine? then would it be a good idea? what about a weighted flywheel?

[cdalejef]

The tecate engine would be the better choice. A flywheel wheight may help but it won't cure it. Yes, you can get bigbore kits for Tecate's too. William Yokley raced a KX250 motored Roll Chassis quad for a couple years, he said it was ridable but after a 2 hour race his hands would be numb.

[diesel-mech]

If I get a tecate engine can you give me advice on how and where to have it built for woods/trail riding? I built my rm250 after spending $750.00 on the top end at l.a.sleeve. They did a great job and with a stock bore plus lots of mods it felt like you were on a 500cc not a 250. I built it for mx not woods. I would like to save alittle $ but I will pay it if the quality is there. I like to do it right the 1st time and have a reliable machine! I had to run race fuel in my RM, no choice! it would barely rev on pump gas. The novellty wears off real quick!!! I want to run on 92 octain not 116. I absolutly loved the big power but I couldn't ride with a group for long because I couldn't fuel up at the gas stations, I couldn't carry spare gas on my bike and an extra gas can will only get you so far

[cdalejef]

I'll do some research for ya tomorrow.

[diesel-mech]

Cool! I do apperciate it. Thank you

[cdalejef]

Now about that turbo :p

[diesel-mech]

SWEEEEET!!!!:blah: :blah: :blah: How bout a HEMI?

[cdalejef]

Originally posted by diesel-mech
SWEEEEET!!!!:blah: :blah: :blah: How bout a HEMI? Naaa.....boys toy! Diesel baby! :macho

[diesel-mech]

Cut me a brake I work for caterpillar and built 550hp and 600hp diesel engines every day! Don't give me that sissy power choke or durramax hipe!LOL Although the powerstroke uses cats heui fuel injection system

[diesel-mech]

:cool: I'm not talking the new hemi! who wants dumbo when you can buy the real elephant! 426 baby!!!