Author Topic: Yamaha YZB info required  (Read 12059 times)

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Offline Davey Crocket

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Re: Yamaha YZB info required
« Reply #45 on: November 19, 2012, 10:25:49 pm »
Thats good but the one to use has a longer arm on it so the clutch pull will be 1 finger (hopefully)....we are making the plastic screw part and that will come with it. If you have that one, how long is the male helix? Cheers.
QVMX.....Australia's #1 VMX club......leading the way.

Offline Iain Cameron

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Re: Yamaha YZB info required
« Reply #46 on: November 19, 2012, 11:57:00 pm »
I havn't bought it Davey (yet ) at $30 is it worth the convert required ?
Yamaha tragic ; dt1, rt1, dt2, rt2, dt2mx , rt2mx , mx250, mx360,sc500, 74dt125, yzx125, yzc250, yzc400, yzd250, yzd400, yzh250, yzh80 , dt100 , xr75 ko xr80 03 , it175 82 . Not a member of any club

Offline Davey Crocket

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Re: Yamaha YZB info required
« Reply #47 on: November 20, 2012, 12:11:37 am »
Hopefully toomorow Ill have the first one....theres lots of little hiccups with the cover. The long one is about $30 NOS on ebay so dont panic.
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Offline Davey Crocket

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Re: Yamaha YZB info required
« Reply #48 on: November 22, 2012, 05:57:28 pm »

This is the first prototype in plastic, the yellow on the botton of the cover wiil have that section removed, its too close to the gear lever. The real ones will be made from 6061 alloy. The clutch feel even with the plastic flexing is way more positive and the lever returns very snappy like a modern bike. There will be a cover for the adjuster. The clutch pull is way lighter, I dont know what they where thinking when they made the originals. Tell me your thoughts fellas.


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Offline Tahitian_Red

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Re: Yamaha YZB info required
« Reply #49 on: November 22, 2012, 06:27:52 pm »
Looks great!!!  ;D
The "Factory Novice"
California, USA

'74 Suzuki TM100, '75 Bultaco 250 Pursang, '77 Honda XR75, '77 Suzuki RM125B, '77 Yamaha YZ400D, '79 Honda CR250RZ Moto-X Fox Replica, '83 Honda ME480RD Mugen

Offline gt96

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Re: Yamaha YZB info required
« Reply #50 on: November 22, 2012, 06:56:50 pm »
Excellent! Assume the top is open so there is no interference with the chain at full travel?
When and how much?
Cheers

Offline Iain Cameron

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Re: Yamaha YZB info required
« Reply #51 on: November 22, 2012, 09:35:37 pm »
Wow it looks great . put me down for three . Iain
Yamaha tragic ; dt1, rt1, dt2, rt2, dt2mx , rt2mx , mx250, mx360,sc500, 74dt125, yzx125, yzc250, yzc400, yzd250, yzd400, yzh250, yzh80 , dt100 , xr75 ko xr80 03 , it175 82 . Not a member of any club

Offline firko

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Re: Yamaha YZB info required
« Reply #52 on: November 22, 2012, 09:44:34 pm »
Fantastic, even better than I'd imagined. Put me down for at least two, possibly four.
'68 Yamaha DT1 enduro, '69 Yamaha 'DT1 from Hell' '69 DT1'Dunger from Hell, '69 Cheney Yamaha 360, 70 Maico 350 (2 off), '68 Hindall Ducati 250, Hindall RT2MX, Hindall YZ250a , Cycle Factory RT2MX flat tracker, Yamaha 1T250J, Maico 250 trials, '71, Boyd and Stellings TM400, Shell OW72,750 Yamaha

Offline Freakshow

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Re: Yamaha YZB info required
« Reply #53 on: November 22, 2012, 09:52:28 pm »
That reversed fitting looks familiar..... ian it works.

If your taking the bottom section out then take the right end section out otherwise it's going to look unbalanced.
Can you incorporate a threaded section or ability to take one for the lover cable outer.
Can you creat a case saver or derailer in the top section so the chain can't Spool up in to the clutch rod, even if you make it alloy backed onto the mag so we can weld a plate in there and put a hole in the flat for the clutch rod to pass through.
The shape of the 2mx is the perfect design to follow as the shape cover everything and room for the gear lever.  D you have one or seen one ? Suss one out
« Last Edit: November 22, 2012, 09:54:37 pm by Freakshow »
74 Yamaha YZ's - 75 Yamaha YZ's
74 Yamaha  flattracker's
70  Jawa 2 valve speedway's

For sale -  PRE 75 Yamaha MX stuff, frame, motors and parts also some YAM DT1,2,A and Suzi TS bikes and stuff

Offline Rossvickicampbell

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Re: Yamaha YZB info required
« Reply #54 on: November 25, 2012, 10:45:23 pm »
Davey - looks good - big isn't it  ;D

One question - since the sprocket cover is so important - is it OK with such a large open area?

Also - Yam Gurus - does anyone have a spare LH crank seal they would be prepared to sell - I am struggling to find one.  Have a RH on the way though?

Part number 93103-30044-00.

Cheers
1974 Yamaha YZ360B
1980 Honda CR250R - Moto X Fox Replica

Offline Rossvickicampbell

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Re: Yamaha YZB info required
« Reply #55 on: November 25, 2012, 10:47:53 pm »
I reckon next years Nats will see a dozen of these on bikes ;D
1974 Yamaha YZ360B
1980 Honda CR250R - Moto X Fox Replica

Offline Freakshow

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Re: Yamaha YZB info required
« Reply #56 on: November 26, 2012, 06:40:39 pm »
Crank seal should be the same as the Dt1 etc same across the board, I just buy them in a pack think you get the six seals for $50
74 Yamaha YZ's - 75 Yamaha YZ's
74 Yamaha  flattracker's
70  Jawa 2 valve speedway's

For sale -  PRE 75 Yamaha MX stuff, frame, motors and parts also some YAM DT1,2,A and Suzi TS bikes and stuff

Offline Freakshow

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Re: Yamaha YZB info required
« Reply #57 on: November 26, 2012, 06:44:30 pm »
Your probably right the open areas at the back would get a lot of shit stuck in there like sticks and stuff.  I'd be inclined to close those down in size and shape
74 Yamaha YZ's - 75 Yamaha YZ's
74 Yamaha  flattracker's
70  Jawa 2 valve speedway's

For sale -  PRE 75 Yamaha MX stuff, frame, motors and parts also some YAM DT1,2,A and Suzi TS bikes and stuff

Offline Rossvickicampbell

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Re: Yamaha YZB info required
« Reply #58 on: November 26, 2012, 06:58:34 pm »
but where from freaky - I use the part number to search which is across a range of bikes and can't find this one?  So if you know where you can buy a pack please let me know?
1974 Yamaha YZ360B
1980 Honda CR250R - Moto X Fox Replica

Offline Freakshow

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Re: Yamaha YZB info required
« Reply #59 on: November 26, 2012, 07:40:00 pm »
No don't search the single part search Dt1 seals they sell them on a carded pack, cost about fifty bucks by the time they get here.  If you get stuck I have some paks here
74 Yamaha YZ's - 75 Yamaha YZ's
74 Yamaha  flattracker's
70  Jawa 2 valve speedway's

For sale -  PRE 75 Yamaha MX stuff, frame, motors and parts also some YAM DT1,2,A and Suzi TS bikes and stuff