Recently Updated Topics

11

The Mad Scientist / Re: NPM engine cases

« Last post by croat1 on April 26, 2026, 07:15:40 PM »

Sharing

12

Duner / Re: 2026 Little Sahara Oklahoma spring ride

« Last post by croat1 on April 25, 2026, 07:24:14 PM »

Group picture

13

Duner / Re: 250R Takeover 2026 - Winchester Bay, OR - July 31 - August 2, 2026

« Last post by havinnoj on April 22, 2026, 07:20:38 PM »

Awesome Joe - any fun stops planned along the way or just driving straight through?

Looking at a map I might change my mind and stop at St. Anthony in Idaho to check out the dunes.

Sounds like an easy decision to make Joe!  I went once in late March (it was still wet and most of the area was closed) but they had some awesome tall dunes out there, would love to get back one day!

14

Lounge / Summer 2026 QOTM

« Last post by croat1 on April 08, 2026, 04:26:09 PM »

Summer 2026 QOTM.  There will be no voting.  A winner will be chosen by a random number generator or a number picked out of a hat.  This will be done at the Winchester Bay ride on August 1st.  Attendance is not required.  All org members can enter.  Entries will close on July 15th.

Topic is anything atc/trx250R A build, complete quad, riding picture.  Fill out the list below or a short write up.

Enrollment is open now for QOTM   Winner will receive a $50 gift certificate from Rocky Mountain ATV.  I am sponsoring this so the gift comes from me.  This is the official thread so post here.

See the rules below.

Thanks everyone. Good luck fellas.

Joe


QOTM Rules
   1.   One post per QOTM entry (i.e. no multi posts for the same entry).
   2.   You may post multiple entries (e.g. if you own 2 250R's, you may make 2 separate posts).
   3.   If you win, PM for gift certificate if your not attending the Winchester Bay ride.
   4.   No blatant advertising or promoting.
   5.   QOTM entries only (i.e. no commenting back and forth - this helps keep the thread clean.
   6.   Fill out QOTM entry template below (copy and paste) or a quick write up.
   7.   For new members please introduce yourself in the new member introduction.  Make a post please.
   8.   Past winners can participate

Failing to comply with these rules may result in removal of QOTM submission.


Chassis | Suspension | Controls:
   1.   Frame:
   2.   A Arms:
   3.   Swingarm:
   4.   Steering Stem:
   5.   Axle:
   6.   Carrier:
   7.   Locknut:
   8.   Hubs F|R:
   9.   Bars:
   10.   Brake/Clutch Lever:
   11.   Grips:
   12.   Foot Pegs:
   13.   Bumper:
   14.   Grab Bar:
   15.   Front Shocks:
   16.   Rear Shock:
   17.   Brake Lines:
   18.   Rotors F|R:
   19.   Rims F|R:
   20.   Tires F|R:

Body:
   1.   Plastic:
   2.   Graphics|Seat Cover:
   3.   Fuel Tank:

Engine|Drive System:
   1.   Cylinder|Head:
   2.   Bore & Stroke:
   3.   Displacement:
   4.   Carburetor:
   5.   Reeds:
   6.   Air Filter|Box:
   7.   Pipe|Silencer:
   8.   Clutch|Plates:
   9.   Gearing F|R:
   10.   CDI|Killswitch:
   11.   Cooling:

Other miscellaneous information.

15

MX / Re: PNW MX

« Last post by All250R on April 08, 2026, 04:12:33 PM »

yea, it's good to see the technology still appreciated

16

The Mad Scientist / Re: Rear caliper mount

« Last post by All250R on March 31, 2026, 08:12:28 PM »

Joe,

This pic shows how close the CRF Caliper mount is to the TRX Support.....it's off by 1/4"

So, either supply a NEW Steel Support....which I have made out of Stainless.

Or supply a NEW Caliper mount to adapt to the TRX support.

That is really close, especially if it floats center line with the rotor.
Is the leverage ratio the same as the stock caliper too (calculate piston face area)?

It's so close that HONDA should have made it the same size...

The Caliper Pistons are the same diameter, so I would say the lever ratio is the same....it works really good and it's a very clean look.

I haven't done much with R tech, or riding since we focused on our relocation to ID.
That caliper is still used for 2026 bikes. Have you done anything to make this a kit for people to buy? If the leverage ratio is the same, seems like a great solution, given how many stock pistons and calipers are corrosion damaged by now.

I still need to get my cylinder head prototype dome machined and tested - however, my lathe got damaged in the move. At least I have lots of ground to actively test now.

17

Lounge / Re: New tool!

« Last post by croat1 on March 25, 2026, 07:08:06 PM »

Pretty happy with the WEN bench top drill press and cross slide

18

Suspension and Chassis / Re: stock link seals and bushings

« Last post by croat1 on March 25, 2026, 07:03:27 PM »

Looks like the linkage kit is discontinued.  Got this from a friend?.

19

Lounge / Re: Binky’s Forever ATC

« Last post by croat1 on March 24, 2026, 07:06:46 PM »

2026 schedule

20

Pics and Vids / Re: Race pic (random) Atc250r

« Last post by croat1 on March 11, 2026, 01:50:10 PM »

Atc250r