famousamos

Was the carb rejetted after purchase? What oil mixture are you using? Fred

The 75-76 TY 250 skid plates were aluminum, same bolt pattern as the 74-75 Fred take a look at http://blackcatvintagetrials.com/2009/10/30/freds-fancy.aspx lots of mods

We've used 80/100 to 1 for years, hasn't caused a problem. Taken motors apart and have had oil in the bottom end. Used in current year GG's and vintage TY's Fred

Does anyone know how much a Pro motor weighs, standard engine, aluminum cases? Fred

That's about 15 pounds lighter than a 250, little more bore and stroke, could have a bike in the 170 pound range. Fred

Does anyone know how much a TY175 motor/transmission weight? Fred

You could use JB weld, we use it to repair hydraulic rods, engine blocks, and what ever. Super glue works on smaller nicks. Fred

when setting sections, its best to make them too easy rather than hard, someone will have fewer points and win the event, or do gate trials events, let the riders pick the line that they can clean. Fred

When I had the work done, I was told that the piston was from a Kawaski personal water craft, lots of power, with most of our meets at 5000 ft to 9200 ft of alitude, the bike pulls real strong even with 2 head gaskets. Fred

The flywheel side will work on a 74-75, the clutch side requires trans shaft and clutch from the 75-76 TY Fred check out how I modified the 74 clutch cover http://blackcatvintagetrials.com/2009/10/30/freds-fancy.aspx

I used the Boysen reeds for the TY250 twin shock, big improvement in low speed performance. Fred

Here's a blog that Tony Down did on my TY250 http://blackcatvintagetrials.com/2009/10/30/freds-fancy.aspx Fred

Check this out, story on my TY by Tony Down http://blackcatvintagetrials.com/2009/10/30/freds-fancy.aspx Fred

We have drained the trans, filled to proper level with premix, run until clutch starts grabbing, drain and fill with trans oil Fred

I ride a 74 ty that's a 290 now, 75mm bore, pulls like crazy at our altitude, events at 5000 to 9200 ft. Tony Down did a blog on the bike, it at http://blackcatvintagetrials.com/2009/10/30/freds-fancy.aspx Lots of mods done. Fred

Our club welcomes everyone, we are out to have fun. Ahrma has been turning down the "modern" twin shock class since 2000 or so, 1979 and newer twin shock, aircooled, drum brakes. the real modern bikes aren't that much of an advantage in a no stop section. The rider is the biggest determining factor in trials.

Thanks Roger, ordered a copy of the book. Fred

I've started riding a Tiger cub, and I'm wondering what differance's there is in the Tiger Cub motors. What is the time frame of the "round" barrel and "square" barrel engines? Is there a differance in the cylinder heads? Other differances in the motors? Thanks Fred

Most modern bikes rake is in the 24 degree area (the fork tubes) I have a 74 Yamaha that I modified the frame and have the forks at 24.5 degree's, trail is in the area of 2.5 inches, the triple trees have 2.5 degree's of rake in them, most bikes have a degree or 2 of differance between the top and bottom clamps. Fred

I'm trying to find out what steering head angle ( or the angle of the fork tubes on a complete bike) is built into the Duncan Macdonald's tiger cub frames? http://www.armac-design.com Fred

I have a 74 TY Yamaha with a tubeless rim on the rear, used a Fantic rim, laced with stock length spokes, works great don't have to worry about pinching tubes. Fantic and Gas Gas TXT's had 36 spoke holes maybe some of the Sherco's, have bought rims off of ebay, going to lace in either a Gas Gas or Fantic rim onto another modified hub and its going onto my Tiger Cub. Fred

Hi Nice to see we have another rider here in Wyoming, have you seen the WMTA web page at www.geosities.com/twoftup There is one WMTA member in the Laramie area and several around Cheyenne. Always looking for some where to ride, could put a school together. Don't worry, everyone started at the same place as you. Nice SWM, I had a new 84 TL 320 many years ago. Fred email me, and I'll get you some phone numbers of members in your area 2feetup@vcn.com