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24th April 2011
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Master Bike Builder
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Join Date: Dec 2008
Location: SOCAL
Posts: 2,086 Sportster/Buell Model: xlch Sportster/Buell Year: 66 Sportster/Buell Model #2: 67 XLH, 63 XLCH Sportster/Buell Year #2: 67 Other Motorcycle Model: FXRT Other Motorcycle Year: 91
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Yetman drag frame
Firstly, I have been MIA for a coupla months, So hello, everyone!
Secondly (?), I have just acquired a Yetman drag racing frame from the late sixties/early seventies! It is really cool. It has VL/WL style rear lower leg section, and is Chromoly. I bought it from a guy who happened into my shop, and was looking to off some old parts. It struck me because it bears a good resemblance to my big twin chopper frame that I had specially built about ten years ago. In fact, it looks like a mini, Sportster version of it. I have a 1963 XLCH motor and a buncha parts to build it with, so I'm pretty jazzed!
If anyone knows anything about Yetman frames, I'd really like to hear what I can. I initially thought it was just a homemade rigid, but the I found this:
http://cgi.ebay.com/ebaymotors/ws/eB...#ht_683wt_1163
So I googled around and found out it's a Yetman for sure.
Pic are coming. |
24th April 2011
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Senior Bike Builder
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Join Date: May 2006
Posts: 1,921 Sportster/Buell Model: 93 Cubic Inch XLH Sportster/Buell Year: 1975 Sportster/Buell Model #2: XLCH Sportster/Buell Year #2: 1968 Other Motorcycle Model: Softail Deluxe Other Motorcycle Year: 2007
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Glad to see that you're back online.
__________________
93 Cubic Inches..3.635 Bore x 4.50 Stroke...Baisley Roller Rockers...Dual Plug Heads Ported With XLR Valves...Chrome Moly Pushrods...Andrews AX Grind Cams .550 Lift...Venolia Pistons...Total Seal Gapless Rings...Balanced S&S Rods & Flywheels...Blitz Steel Barrels...Billet Oil Pump...K&N O2 Sensors...S&S Super E Carb...Crane Fireball Multi Spark Ignition...All Andrews Trans Gears & Shafts...Strociek Billet Trap Door...Barnett Kevlar Wet/Dry Clutch...Motorsport Rear Motor Mount...High Torque Starter...100 Plus HP
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24th April 2011
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Master Bike Builder
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Join Date: Dec 2008
Location: SOCAL
Posts: 2,086 Sportster/Buell Model: xlch Sportster/Buell Year: 66 Sportster/Buell Model #2: 67 XLH, 63 XLCH Sportster/Buell Year #2: 67 Other Motorcycle Model: FXRT Other Motorcycle Year: 91
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thanks, it's good to be back!
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24th April 2011
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: London, ON Canada
Posts: 23,708 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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Welcome! back. Great project starting ...
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25th April 2011
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Master Bike Builder
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Join Date: Dec 2008
Location: SOCAL
Posts: 2,086 Sportster/Buell Model: xlch Sportster/Buell Year: 66 Sportster/Buell Model #2: 67 XLH, 63 XLCH Sportster/Buell Year #2: 67 Other Motorcycle Model: FXRT Other Motorcycle Year: 91
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Pics:
My new (to me) frame
My Big Twin chopper:
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25th April 2011
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Land Speed Record
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Join Date: Jan 2011
Posts: 703 Sportster/Buell Model: dragbike Sportster/Buell Year: 1960
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that's a Yetman with some added moulding and a brake cross shaft added. They are not chromoly but are DOM mild steel tubing and are brazed together rather than heli-arc welded. They were THE frame for drag racing back in the day and I used one for many years. I am currently building repops of them and an updated version for vintage drags. I ran 9.30's @140mph with a Yetman and in spite of the fact that they were brazed together I never had a weld failure. The rear sections were very prone to twisting and metal fatique failures as HP and traction increased over the years. when they were designed the tires were only 4" and hard as a rock. Probably the best looking of all the early drag frames and an iconic piece of early speed equipment.
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26th April 2011
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Master Bike Builder
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Join Date: Dec 2008
Location: SOCAL
Posts: 2,086 Sportster/Buell Model: xlch Sportster/Buell Year: 66 Sportster/Buell Model #2: 67 XLH, 63 XLCH Sportster/Buell Year #2: 67 Other Motorcycle Model: FXRT Other Motorcycle Year: 91
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So it's DOM? I read about the brazing thing, and I think i will avoid welding on this frame ( both to preserve it, and to avoid melting any brazed joints) I think i'm going to build a little street bike out of it. I will probably mount pegs to the motor early ness style on the shifter, and plate the primary side.
I could tell the brake stuff was added. It has an anchor slot, as well as the crossover. It also has some fender mounting stuff added out back.
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27th April 2011
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Land Speed Record
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Join Date: Jan 2011
Posts: 703 Sportster/Buell Model: dragbike Sportster/Buell Year: 1960
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Ground clearance with a 26" tall rear tire is only 2 1/4".
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27th April 2011
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Master Bike Builder
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Join Date: Dec 2008
Location: SOCAL
Posts: 2,086 Sportster/Buell Model: xlch Sportster/Buell Year: 66 Sportster/Buell Model #2: 67 XLH, 63 XLCH Sportster/Buell Year #2: 67 Other Motorcycle Model: FXRT Other Motorcycle Year: 91
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I mocked it up with an 18" rear , and a 19" in the Marzocchi fork in the pics, and I''m getting around 3 1/2 or 4". That's still really low, but I have bikes for canyon riding, etc. This one will be rarely ridden, and will avoid twisties. Besides, my back wont tolerate much seat time on a rigid sportster anyway!!
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28th April 2011
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Land Speed Record
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Join Date: Jan 2011
Posts: 703 Sportster/Buell Model: dragbike Sportster/Buell Year: 1960
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Good luck, it will make a really neat project. They are great looking frames. You can see a picture of the new vintage style frames I am building at ebay item #170629659942 ( I'm an old fart and don't know how to do a link,lol)
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