Author Topic: ATC250r "Not A Project" Project (Read 14071 times)

TonyD · « **Reply #15 on:** August 21, 2015, 10:45:49 AM »

Ok, so i brought the stator side case in to work to press the tranny bearings in as it wasn't happening with limited tools at home. Even though I froze the bearings and heated the cases, they still were to tight for my comfort on not getting them stuck halfway or something (guess the new esr cases are goodntight?!). It worked for the crank bearing but not the others. Anyways, it worked much easier with a press and heat gun:

Question to the experienced: when i get ready to pull the cases together, being as i have a hot rods crank, should I try to open up the ID on that bearing to accomplish the slip fit like stock? I know this is an often discussed item. I don't have a real hone (which I think would be the best/easiest) but probably could take it to one of the local shops to take a few tenths out.

JesseA420 · « **Reply #16 on:** August 21, 2015, 12:42:25 PM »

tenths!? no dont do that lol

havinnoj · « **Reply #17 on:** August 21, 2015, 01:48:04 PM »

Well [MENTION=1348]TonyD[/MENTION] making quite the intro! We know he's crazy since he rides a trike with paddles on backwards! No no .. I joke :rofl:

But seriously, welcome to the site!

hickwheeler · « **Reply #18 on:** August 21, 2015, 03:14:46 PM »

I have a crank puller and live in Shelton.

TonyD · « **Reply #19 on:** August 21, 2015, 04:05:26 PM »

Quote from: JesseA420

tenths!? no dont do that lol

Yeah, sorry meant ten-thousandths, bad slang from machinist days:kiwi-fruit:! I've read the interference/press is around 0.0003 which doesn't seem too bad...

Quote from: havinnoj

Well @TonyD making quite the intro! We know he's crazy since he rides a trike with paddles on backwards!

Lol, that must be why i always lost the hillclimbs! I'm glad people are paying attention so I don't do something really silly like install my cylinder upside down :stupid:

atvcrazy · « **Reply #20 on:** August 21, 2015, 05:56:40 PM »

Get a tusk crank pulling tool from Rocky Mountain atv makes pulling the hot rods crank easier to pull into bearings. I put alittle freeze on the main journal area of the crank

Skeans1 · « **Reply #21 on:** August 21, 2015, 09:06:15 PM »

I have one I'm only a little south of you you're welcome to come down and get it to borrow.

TonyD · « **Reply #22 on:** August 21, 2015, 10:48:03 PM »

Thanks for the offer, I ordered the puller but may hit you up if it takes too long!

Got some NOS tank scoops, as well as maier front and rear fender. I did a test with the razor blade scraping routine on the oxidized tank. Worked we'll but I can quickly see it makes a mess so I'll take it off to really get at it.

Also got some clutch hardware in. The basket is the wOrks style, and includes plates. Not sure what springs I should run though? Also have the 89 upgrade hardware so I should be almost set.

Picked up a 98 cr ignition, I kept loosing on the later year versions on ebay. Anyone else have a pic/suggestion on where and how to mount? I was assuming next to the steering stem, might be a little thick without separating out the components a little?

TonyD · « **Reply #23 on:** August 22, 2015, 10:16:31 AM »

I don't know why that last post previews the pics upside down, but they show right side up when opened?:concern:
Course I do have my paddles on backwards....jeez! :rofl:

TonyD · « **Reply #24 on:** August 26, 2015, 10:51:15 AM »

Little more progress, got the stock rear brake linkage re-zinc plated. Was going to powdercoat the brake arm but thought I'd see if I could buff the old chrome back to life and it worked alot better than I thought. Got the hinson basket and ground the rivets off the old one to get the gear.

I'm going with a crf450 front caliper conversion on the rear, so I had to design up a brake stay. First I made a template and then had it machined. Fits great but need to thin the area where the caliper mounts slightly to center the caliper on the rotor. But I'm having trouble getting the lonestar anti-fade to slide all the way over the splines on the axle; Idon't want to get it stuck but feels like there might be interference on the splines (ordered these both at the same time). Has anyone else had this problem?

TonyD · « **Reply #25 on:** August 31, 2015, 03:35:44 PM »

Got a good amount of progress done this weekend on the motor, although not without it's challenges. Mainly i didn't notice the clearancing required to run the +4 hotrods crank until I had already pressed the crank into the left crankcase:disillusionment:. Luckily i caught it before getting the whole thing together, so I disassembled and ground clearance and then rechecked with the cylinder/piston mocked up to make sure it was good.

But finally got to this point:

And got the rest of the new plastic installed:

:eek-new:

ytman · « **Reply #26 on:** August 31, 2015, 08:36:37 PM »

Bitchen

Sand_Blaster · « **Reply #27 on:** September 01, 2015, 12:01:11 AM »

Stunning!! Love that motor

pantera1975 · « **Reply #28 on:** September 02, 2015, 07:04:27 PM »

Looks nice.

Full Throttle · « **Reply #29 on:** September 02, 2015, 10:47:00 PM »

These are my favorite machine ever made.You did a great job on it,freaking thing is gorgeous.
you able to keep that front wheel down with that motor and the extended swinger?