Mik329's Gen 4 250

Mik329 · Post by **Mik329** » November 6th, 2011, 6:48 pm

I started this thing a couple years ago and pretty much never had time to work on it. Finished the frame once with Bob's design, then decided to do another frame with a full cradle replacement. I had a semi mocked up frame a couple days ago so it's been a productive weekend with the wife outta town.....

100hp honda · Post by **100hp honda** » November 6th, 2011, 7:13 pm

should of converted the other bike before the motor blows up

Post by **AlisoBob** » November 6th, 2011, 7:13 pm

SWEET!!

Mik329 · Post by **Mik329** » November 7th, 2011, 5:54 am

100hp honda wrote:should of converted the other bike before the motor blows up

If that happens I will throw a 500 motor in it for sure, then maybe turn this build into a big bore 250. I've got a few frames laying around and I am going to pick up a CR250 motor when the right one comes along. I like riding the four stroke but I HATE the sound of it and I tend to throw a lot of tools when I have to work on the POS.......

iggys-amsoil · Post by **iggys-amsoil** » November 7th, 2011, 6:57 am

Mik329 wrote: ... and I tend to throw a lot of tools when I have to work on the POS.......

Sorry but that was

Tharrell · Post by **Tharrell** » November 7th, 2011, 9:38 am

iggys-amsoil wrote:
Mik329 wrote: ... and I tend to throw a lot of tools when I have to work on the POS.......
Sorry but that was

Yup

AMA714 · Post by **AMA714** » November 12th, 2011, 5:25 am

I have to say .... I
m slightly jealous of you garage! Nice set up Mic.

I agree with you on the 4 stroke, I like riding it. Now that Im starting to get used to riding my 500, Its making me turn faster lap
times on my 450

Mik329 · Post by **Mik329** » December 4th, 2011, 5:27 pm

Scored on Ebay last week. 20mm RG3 clamps in pretty good shape for 275 bucks. Ordered the rubber kit and I should be good to go....

riverman · Post by **riverman** » December 4th, 2011, 6:49 pm

I have the same clamps. They were on the bike I bought for 500$ bad engine. Sold the bad engine carb and exhuast for 400$ to a guy building go carts.

riverman · Post by **riverman** » December 4th, 2011, 6:56 pm

Try that tank yet????? any pic's? I just bought the Acerbis tank on ebay for 199.94 and free shipping. When it gets here I will decide to try it myself or send it to Bob. I have 3 leaking stock tanks already.

Mik329 · Post by **Mik329** » December 10th, 2011, 11:30 am

riverman wrote:Try that tank yet????? any pic's? I just bought the Acerbis tank on ebay for 199.94 and free shipping. When it gets here I will decide to try it myself or send it to Bob. I have 3 leaking stock tanks already.

Yes, it fits OK with plenty of room for plug change. I've never used Cycra plastic, this is the first time and it all lines up. The radiator braces fit a little funcky with that goofy air scoop. The tank was damaged ( fuel outlet tube) in shipping so they are sending me another one.

riverman · Post by **riverman** » December 10th, 2011, 1:09 pm

I bought the Acerbis Bob recommended. It should be here this week. Then I have to decide to mod it my self or send out to have it done. Your tank looks good. It would have been alot cheaper.

Mik329 · Post by **Mik329** » December 10th, 2011, 3:10 pm

You're better off if it's not just a track bike. I would guess this tank holds just over a gallon so it would not be ideal for desert or trail set up.

riverman · Post by **riverman** » December 11th, 2011, 6:43 am

Your build looks great!!!!!!!!! Yes mines just a trail bike so the bigger tank will be great.

Mik329 · Post by **Mik329** » December 31st, 2011, 8:20 pm

Looks like I'm coming up about a half inch short at the airbox using an 01 CR 250 boot. Anyone know if any other years are a bit longer?

scooter5002 · Post by **scooter5002** » December 31st, 2011, 9:43 pm

I had to use a reed spacer on my 450 to bring the whole assembly back enough to comfortably fit my bike. Would that give you enough, or is that trick already in use?

Mik329 · Post by **Mik329** » January 1st, 2012, 1:49 pm

No reed spacer yet. Just a PWK and Boyesen RAD valve. Turns out what I have here is two 01 boots when I thought I had a 99 as well. Freakin Ebay pukes don't know what years they are selling. Gonna try a stock 500 boot like Bob used.

mxdogger · Post by **mxdogger** » January 3rd, 2012, 5:25 pm

Those frame rails and billet headstay sure look nice, yeah nice garage.

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » January 3rd, 2012, 5:53 pm

Mik329 wrote:Scored on Ebay last week. 20mm RG3 clamps in pretty good shape for 275 bucks. Ordered the rubber kit and I should be good to go....

I only have the top clamp, I really like it

Post by **AlisoBob** » January 3rd, 2012, 6:37 pm

Mik329 wrote:Gonna try a stock 500 boot like Bob used.

My thinking is that the 500 boot was made for the airflow demand of the 500cc engine. Some of the other boots look restrictive.

Mounting it to the airbox with a clear 1/2" thick lexan plate was easy-peasy and the thickness of the plate filled the gap perfectly.

It also wraps around the shock nicely on the Gen 4 CRF250 chassis.

It worked well for me.

gregrobo · Post by **gregrobo** » January 3rd, 2012, 7:20 pm

AlisoBob wrote:
Mik329 wrote:Gonna try a stock 500 boot like Bob used.
My thinking is that the 500 boot was made for the airflow demand of the 500cc engine. Some of the other boots look restrictive.

Mounting it to the airbox with a clear 1/2" thick lexan plate was easy-peasy and the thickness of the plate filled the gap perfectly.

It also wraps around the shock nicely on the Gen 4 CRF250 chassis.

It worked well for me.

ill second that bob i used hdpe polly plastic instead worked a treat and clears the shock sweet

Mik329 · Post by **Mik329** » September 3rd, 2012, 3:42 pm

Finally had some time to work on this thing. I should be close next week if I dont have a trip. Just have to finish some tabs for the exhaust and weld on the coil mount. I'm going to take the heat gun to the stock tank still just in case I dont like the fit of the China tank.

Post by **AlisoBob** » September 3rd, 2012, 5:28 pm

SWEET!!!!!

kevin_s · Post by **kevin_s** » September 3rd, 2012, 6:57 pm

Nice job Dude,if you do decide to mod the tank,I might suggest you try putting the tank in a press,then heat it while it's under pressure where needed.worked real good for me.

Mik329 · Post by **Mik329** » September 21st, 2012, 5:01 pm

Done but not tested yet other than pissing off my hood while I was playing with jetting. I tried not to bling it out too much, no graphics as this one will probably be for sale shortly and the new owner can decide on that.

BannedCR500Riders.com

Mik329's Gen 4 250

Mik329's Gen 4 250