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Author Topic: 1971 Kaw F8 Bison 250 goin' down.  (Read 5351 times)

Offline TranceMachineVienna

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Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #10 on: Sep 02, 2016, 04:48:08 »
I smell 2 stroke!count me in sir!

Offline runmikeyrun

  • Posts: 391
Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #11 on: Sep 06, 2016, 14:09:48 »
Back from vacation.  I actually dreamed about working on the bike while I was away.  Two nights in a row.

Psychological issues aside, I got down to some stuff today.  I was smart enough to order a bunch of stuff before I left so I had some parts waiting for me.  I replaced the mangled gauges with some eBay units. 

The new gauges came with the dash lights, which was nice because mine were corroded to all hell.  Stuck them inside some loom. 
Also lubed the cables and replaced a broken brake lever.  One of those fancy upside down units...

Speedo cable is shot.  Adding that and some gauge light bulbs to the list.

Found the source of my oil leak wasn't just a loose clutch cover.  Seems the shift shaft runs all the way through to the right side of the motor and out of the clutch cover.  The only reason I can think of this would be flat track, moving the shifter to the right side and removing the rear brake.  I've never seen anything like it before.  Anyways, the seal is shot so it's going on the list. 

END OF LINE.

Live to ride, Ride or die.

Past:
Rupp Minibike
Benelli Minibike
Tomos Moped (lol)
74 RD250
81 XT125
76 KH400
79 YZ250
77 RD400

Present:
14 Yamaha Bolt
81 KZ750E
94 XR250L
68 CL350 (in process)

Yeah, it's dangerous.  That's why I like it.

Offline advCo

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Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #12 on: Sep 06, 2016, 14:18:18 »
Interesting setup with the shifter spline. Never seen that before either. Going to be able to save those forks?
"He broke the mirrors off his Cadillac, 'cause he doesn't like it looking like he looks back."

74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0 - Sold
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0 - Sold
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0
'97 BMW F650st - http://www.dotheton.com/forum/index.php?topic=75732.0

Online julian.allard66

  • Posts: 279
Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #13 on: Sep 06, 2016, 14:40:12 »
A few early Japanese bikes had gear change shafts like that so that the gear change could be on either side for different markets, the rear drum is usually on a cable as well so that it can be either side.

Offline runmikeyrun

  • Posts: 391
Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #14 on: Sep 06, 2016, 14:58:56 »
Interesting setup with the shifter spline. Never seen that before either. Going to be able to save those forks?
The forks are ok in the travel area, so yeah. 
END OF LINE.

Live to ride, Ride or die.

Past:
Rupp Minibike
Benelli Minibike
Tomos Moped (lol)
74 RD250
81 XT125
76 KH400
79 YZ250
77 RD400

Present:
14 Yamaha Bolt
81 KZ750E
94 XR250L
68 CL350 (in process)

Yeah, it's dangerous.  That's why I like it.

Offline runmikeyrun

  • Posts: 391
Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #15 on: Sep 06, 2016, 14:59:27 »
A few early Japanese bikes had gear change shafts like that so that the gear change could be on either side for different markets, the rear drum is usually on a cable as well so that it can be either side.
Makes sense! 
END OF LINE.

Live to ride, Ride or die.

Past:
Rupp Minibike
Benelli Minibike
Tomos Moped (lol)
74 RD250
81 XT125
76 KH400
79 YZ250
77 RD400

Present:
14 Yamaha Bolt
81 KZ750E
94 XR250L
68 CL350 (in process)

Yeah, it's dangerous.  That's why I like it.

Offline runmikeyrun

  • Posts: 391
1971 Kaw F8 Bison 250 goin' down.
« Reply #16 on: Sep 06, 2016, 15:51:08 »
No photos, but I pulled off the front wheel.  The front brakes and drum look good, reassembled and adjusted.  I left the fork oil alone; I am going to do the seals at a later date and I will change it then.

Done for the day.  Waiting on a petcock and battery and I need to find a headlight and signals as well.
END OF LINE.

Live to ride, Ride or die.

Past:
Rupp Minibike
Benelli Minibike
Tomos Moped (lol)
74 RD250
81 XT125
76 KH400
79 YZ250
77 RD400

Present:
14 Yamaha Bolt
81 KZ750E
94 XR250L
68 CL350 (in process)

Yeah, it's dangerous.  That's why I like it.

Offline runmikeyrun

  • Posts: 391
1971 Kaw F8 Bison 250 goin' down.
« Reply #17 on: Sep 10, 2016, 00:22:08 »
Not too much today.  Put on the new petcock (heh heh) and since the screen doesn't fit in the tank I installed an inline filter.  I forget if it was Klemm's vintage or Junkman adv that had a link to the right petcock.  Anyways, it's a Biker's Choice chrome petcock for HD #011411 so I'm pretty sure it made my bike louder and lose 10 horsepower . I also rinsed the inside out thoroughly as there was quite a bit of rust on the old petcock screen. 

Painted my recycled chrome turn signals with some plastidip.  I love this stuff.


Horn was weak at best, so I checked the switch and it was crustified.  Sanded the terminals and spring and now works great. 


Ordered some headlight bucket ears, a 6v halogen bulb which I will Frankenstein into the existing sealed beam headlamp, and I'm working on clutch cover items- cover gasket and shift shaft/Kickstarter seals.  Oil leak was too bad to continue.  Will replace clutch discs and springs while I'm in there too, if I can find replacements.  I'm finding that there aren't many parts left out there for these.
END OF LINE.

Live to ride, Ride or die.

Past:
Rupp Minibike
Benelli Minibike
Tomos Moped (lol)
74 RD250
81 XT125
76 KH400
79 YZ250
77 RD400

Present:
14 Yamaha Bolt
81 KZ750E
94 XR250L
68 CL350 (in process)

Yeah, it's dangerous.  That's why I like it.

Offline jimmer

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Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #18 on: Sep 10, 2016, 09:23:10 »
Nice progress👍👍
Yamaha Blaster Bike                                                                  Suzuki T500 Titan Twingle

Offline runmikeyrun

  • Posts: 391
Re: 1971 Kaw F8 Bison 250 goin' down.
« Reply #19 on: Sep 13, 2016, 15:41:36 »
Tried to replace the crusty tube inside the 45 year old front tire today.  Tire itself was ok enough to ride out the last of the season but I at least wanted to have legit tubes in there.  Well the tires are as hard as you can imagine and the iron slipped, smashing my finger into the end of the axle.  As soon as I finished throwing the tire irons and swearing I broke down and ordered two new tires and tubes.  I will let a shop handle the swap! 

On a positive note, all turn signals are installed and working.
END OF LINE.

Live to ride, Ride or die.

Past:
Rupp Minibike
Benelli Minibike
Tomos Moped (lol)
74 RD250
81 XT125
76 KH400
79 YZ250
77 RD400

Present:
14 Yamaha Bolt
81 KZ750E
94 XR250L
68 CL350 (in process)

Yeah, it's dangerous.  That's why I like it.