AlisoBob's Gen 4 A/F Conversion

dannygraves · Post by **dannygraves** » October 19th, 2009, 8:45 am

on my gen-4 I put it right above the head above the Y, very OEM like.

Mik329 · Post by **Mik329** » October 19th, 2009, 2:30 pm

dannygraves wrote:on my gen-4 I put it right above the head above the Y, very OEM like.

did you weld in one of shanmans coil mounts or something else?

dannygraves · Post by **dannygraves** » October 19th, 2009, 5:15 pm

I made 2 peices about 1" long out of 1/4" plate and drilled and tapped holes, then welded those. I'd show you a pic, but my hosting space got all f-ed up. It was essentiallt like the oem mount and loaction, only higher up.

97af · Post by **97af** » October 19th, 2009, 5:27 pm

Roostius_Maximus wrote:
the internet is back on thismorning and heres what i got...

Classic !!!

Post by **AlisoBob** » October 26th, 2009, 7:21 pm

I'm modifying my tank in the next few days..... I'll take some photos, and do a " Step by Step".....

NightBiker07 · Post by **NightBiker07** » October 30th, 2009, 12:41 am

I'm assuming you never did plumb the spars?
I would like to do something like that to my bike, but add a valve so they would be a switchable reserve so i knew when fuel was getting low.

Post by **AlisoBob** » November 25th, 2009, 8:35 pm

CR500R7 wrote:Well done Bob, 25047 views.
People must really like this bike.

30,000 +

homenf · Post by **homenf** » November 25th, 2009, 10:46 pm

a fair share of those were mine trying to find what spacers you used. So I guess I should ask: What spacers did you end up using for the rear?

Post by **AlisoBob** » November 25th, 2009, 11:00 pm

Its in there.... you flip one side to side, and go buy one from a cr250.....

CR500R7 · Post by **CR500R7** » November 26th, 2009, 11:27 pm

AlisoBob wrote:Its in there.... you flip one side to side, and go buy one from a cr250.....

Don't you mean one from a CR125, Bob?

homenf · Post by **homenf** » November 27th, 2009, 8:54 am

iggys-amsoil wrote:Get the spacers for a 03 CR125. Per AJ. Thats what I did.

This was all I found about spacers. Prior to this you didn't have it lined up perfect.

dannygraves · Post by **dannygraves** » November 27th, 2009, 9:00 am

the '02+ cr125s have a 59mm and a 54mm bushing. you want to buy the 59mm and use your existing 54mm, just move the 54 to the other side.

homenf · Post by **homenf** » November 27th, 2009, 9:01 am

Perfect! Thanks

Post by **AlisoBob** » November 27th, 2009, 11:42 am

The CR250 must use the same sleeve, as thats what I used

Mik329 · Post by **Mik329** » November 28th, 2009, 5:49 am

AlisoBob wrote:The CR250 must use the same sleeve, as thats what I used

agreed, not like I've made much progress on it this last year but it's sitting on the bunch mocked up with those spacers....

CR500R7 · Post by **CR500R7** » November 28th, 2009, 6:37 pm

OK this might save some confusion when stuffing a CR500 engine into these frames.

The Std CRF250 04-09 uses a 49mm on the left and a 59mm on the right, with the CR500 engine get a 54mm for the left side and you are done.

The Std CRF450 02-04 uses a 49mm on the left and a 54 on the right, with the CR500 engine swap right to left and get a 59mm for the right side and you are done

The Std CRF450 05-09 uses a 46mm on the left and a 54mm on the right, with the CR500 engine swap right to left and get a 59mm for the right side and you are done.

The Std CR125 02-07 uses a 54mm on the left and a 59mm on the right, with the CR500 engine you are good to go as is.

The Std CR250 02-07 uses a 49mm on the left and a 54mm on the right, with the CR500 engine swap right to left and get a 59mm for the right side and you are done.

Part# for the 54mm bush is 52142-KZ4-J40, left side of swingarm.

Part# for the 59mm bush is 52141-KZ4-J40, right side of swingarm.

If any of this is incorrect, please let me know so I can change it before any mistakes are made.

RideRed · Post by **RideRed** » December 8th, 2009, 10:09 am

Is this something that needs to be done when converting all CRF bikes? Or, did you do this because of an "oversized" spring?

Post by **AlisoBob** » December 8th, 2009, 10:48 am

Both, I think....

dannygraves · Post by **dannygraves** » December 8th, 2009, 11:10 am

I didn't have to on any of my conversions. I think thats just for the fatty spring.

Post by **AlisoBob** » December 8th, 2009, 11:39 am

dannygraves wrote:I didn't have to on any of my conversions. I think thats just for the fatty spring.

It might be a 250X thing... I know the linkage is different....

pstoffers · Post by **pstoffers** » December 8th, 2009, 12:25 pm

I had to do that to all 3 of the gen3's I have done...

CR500R7 · Post by **CR500R7** » December 8th, 2009, 8:13 pm

Did you have to removed a lot of material?

31170 veiws

it's getting up there Bob.

DPinDet · Post by **DPinDet** » December 8th, 2009, 8:27 pm

My 2004 CR250 conversion did not require this. I was running a 5.4 spring too . Maybe I got lucky ? ? ?

DPinDet

RideRed · Post by **RideRed** » December 9th, 2009, 2:09 am

Thats strange that the results are so hit & miss...I hope I don't have to.

HrcRacing · Post by **HrcRacing** » December 9th, 2009, 4:09 am

I didn't have to do it on the '04 SH 500AF (CR250 based) I had but it was close. If I went with a heavier spring, I feel like it would have needed it.

Just check it when you get to that point. If it needs it, it needs it. No big deal.

BannedCR500Riders.com

AlisoBob's Gen 4 A/F Conversion

conversion