Recent Activity
All
riv187 Added a reply to 1980 rm125t stator
6/13/2026 4:42pm I have a 79 I have raced for several seasons. Absolutely the stator coils fail and it shows up late in moto as they short from heat. Custom rewind has done 2-3 for me. I would call again. Have patience,, I believe he is a small business, and as such an illness , wedding, vacation can be reason he’s not...
More »
riv187 Added a reply to 1980 rm125 cylinder
1/2/2026 9:55am The oil is not just for cylinder and piston. Bearing life. I learned what Im sharing, from racing and going right to Eric Gorrs house and picking his brain when getting mine freshened. I take a old one and send it to custom rewind in Alabama. Take pictures of it before it leaves so you can confirm the coil wires...
riv187 Added a reply to 1980 rm125 cylinder
1/2/2026 9:35am Hi, Ive had a 78,79 and 80 rm125s for 40+ years racing them. If you are traveling to a race any distance,,it pays to have a rewound stator along. Ive used custom rewind. The varnish on the stators breaks down with heat and age,,leading to misfires when they get hot. Imagine traveling to that 1 race and all the expenses...
riv187 Added a reply to 1980/81 Yamaha YZ 465 expert's?
8/28/2025 8:18am I would not hesitate to have a competent TIG welder correct the head angle on your YZ. Look for a sprint car shop,race supply shop and ask them for a local to Iowa chassis repair. Knoxille IA is sprint car capital out there.
riv187 Added a reply to Best carburetor for an 1985 KX125
8/8/2025 1:39pm One nuisance with carb changes is finding the right cable and throttle. I did a quick motion pro vortex throttle with my YZ125 PWK carb swap...I think it was a big improvement.
riv187 Added a reply to Best carburetor for an 1985 KX125
8/8/2025 1:25pm I use a PWK I think 89 KX125 carb on my 1980 YZ125. I really like how it added more bottom- even compared to the smaller stock 32vm Mik round slide. The KX carb on your 85 is a good one, R-slide Oval bore. I also have this bike,,and don't think I'd make change unless the slide and slide bore...
riv187 Added a reply to 1978 rm 125
8/5/2025 5:10am I'm 90% sure 76,77 are same as 78. Would be as easy as going on partzilla for parts and comparing numbers. I have 77,78,79,80 rm125s and amost positive the 79-80 was different.
riv187 Added a reply to Replacement plastic straps for vintage Alpinestars Victory boots?
4/14/2025 12:42pm Cool old boots. I wore a set when they came out. I quickly lost 1-2 straps just from them falling out. Maybe you can take a old one and get it 3D printed.
YZ125Ken Liked a reply to forum topic 83 kx125 build
4/8/2025 5:48pm
Great job! Good looking bike! I just finished a 1983 YZ125. Man, talk about hard to find parts! These old girls should be saved and restored. Nothing like the old two strokes!!
This forum topic has 17 replies.
riv187 Added a reply to Project YZ465 -81 (also parts needed)
2/24/2025 8:33am Also.... last thing you want with a 465 is screwed up timing from wrong parts....that backfire one time will ventilate another case and kicker gear.
riv187 Added a reply to Project YZ465 -81 (also parts needed)
2/24/2025 8:30am Hi, I can’t stress enough you need to get this manual if you don’t already. Clymers version has some info,, but there books are multiple models that confuses info. Nothing like factory one. Also,,, in cases like yours,, a complete parts bike is often money well spent. Projects like these will kill you one part at a time. I prefer...
mxracer106 Liked a reply to forum topic '86 DMC KX
1/15/2025 6:20am
I wish I would have kept this one....
This forum topic has 16 replies.
dkurtd Liked a reply to forum topic '86 DMC KX
12/20/2024 5:30am
I always liked the white 1983 KX80 that he did, Mouse Mccoy testing it out.
This forum topic has 16 replies.
riv187 Added a reply to Keystone 1980 CR250 Any information??
11/21/2024 6:20am Wow you are a collector! This is a interesting subject,,,how to get the bikes without the hassle. My collection is a bit larger,,I made a list cause I forget. My buddy used to say when bike delivered to his house,,Oh its Rivs bike not mine...he didn't want his wife to know...and vise versa.... I also in my past would have...
riv187 Added a reply to Keystone 1980 CR250 Any information??
11/20/2024 4:25pm Thanks !!!!!
Hasletjoe Liked a reply to forum topic Keystone 1980 CR250 Any information??
11/20/2024 4:24pm
Saw this ad in another Vital MX Old School thread
This forum topic has 11 replies.
riv187 Added a reply to Keystone 1980 CR250 Any information??
11/20/2024 6:22am Sandman....I have done some pretty irrational things to get certain bikes...the most irrational one I done was taking my wife on one trip.
sandman768 Liked a reply to forum topic Keystone 1980 CR250 Any information??
11/20/2024 5:47am
Sometimes the acquisition process is the best story….I have done some pretty irrational things to get certain bikes….I can look at each one of the bikes in my collection and tell you a story about how I acquired it….like driving to UP of Michigan to buy a very clean low hr 2001 Yz250….. mind you, I live 10-12 hrs away in upstate NY…or driving to Central Mass to look at a 90 KX 250 off facebook, with photos so poor you could barely tell it what it was, but I seen something that made me think it was low hrs...
This forum topic has 11 replies.
riv187 Started a new thread Keystone 1980 CR250 Any information??
11/18/2024 6:39am Hi, this is unique bike I got many years ago. Was found near Beaver Falls where Keystone/Pro Action shop is. The obvious trick parts are modified fox arm, real CR250 head, foxs. I got the bike 20 years ago and these are those pictures. I reached out to George Quay, hope he can shed more light on it,,but if anyone...
This forum thread has 11 replies.
riv187 Added a reply to 1980 yz125G port and crank mods
10/28/2024 8:38am 12/50 gear. 2nd gear starts. NOS clutch basket ,,need smooth release. Welding I wasn't worried about warpage because of the fins sucking heat out and the shape of head.. Vforce I think I removed their embossment,LOL.I did the bike in 2009.