OzVMX Forum

Marque Remarks => Spaniards (Bultaco, Ossa, Montesa etc) => Topic started by: TooFastTim on July 21, 2012, 03:26:08 pm

Title: Yes please...
Post by: TooFastTim on July 21, 2012, 03:26:08 pm
(http://a4.sphotos.ak.fbcdn.net/hphotos-ak-snc6/255177_166081420120849_6612837_n.jpg)
Title: Re: Yes please...
Post by: Slakewell on July 21, 2012, 03:37:39 pm
Nice  :)
Title: Re: Yes please...
Post by: jerry on July 21, 2012, 07:18:36 pm
Any more shots? Very tasty. J
Title: Re: Yes please...
Post by: Montynut on July 21, 2012, 08:48:15 pm
Great looking bike. Fantastic restoration. The front wheel looks like it is from an '81 Montesa VG414?
Title: Re: Yes please...
Post by: huskibul on July 21, 2012, 09:16:08 pm
  thats a gem ! what model/capacity and are there any or many in Aus  ?  ;)
Title: Re: Yes please...
Post by: maico police on July 21, 2012, 09:39:14 pm
Sorry but that's gone a bit mental. Looks like it'd be a full time job keeping the chain on the thing..... ???
(and probably have the straight line stability of a Maltese shitzu on crack cocaine).
Title: Re: Yes please...
Post by: huskibul on July 21, 2012, 09:58:51 pm
      The geometry looks just like any other evo era bike to me ! it still looks trick , personally id rather a 77  'mk10   
Title: Re: Yes please...
Post by: Montynut on July 21, 2012, 10:19:32 pm
I think Ross is referring to the agle of attack of the swingarm with the shocks fully extended. The chain is pulling over the swingarm pivot meaning the engine will compress the suspension seriously under power and the swingarm will be sawn in half by the chain.

The shocks are around 25mm (at least) too long.

If you compare it to most EVO bikes that are set up correctly the swingarm angle of attach is usually much less. I am not referring to all those HL500 things with massively over length shocks to try and get 13" of travel from a 10" travel frame/swingarm setup (I'm just using the HL500 as an example not trying single them out).
Title: Re: Yes please...
Post by: huskibul on July 22, 2012, 07:57:31 am
    Agreed the rear does look too high , they look like (longer?) aftermarket ohlins and if it were mine id drop the whole thing at least 2"-3" just for the ease of living with it (and conering) - it's still a big"yes please"
Title: Re: Yes please...
Post by: maico police on July 22, 2012, 08:22:25 am
Quote from: Montynut on July 21, 2012, 10:19:32 pm

If you compare it to most EVO bikes that are set up correctly the swingarm angle of attach is usually much less. I am not referring to all those HL500 things with massively over length shocks to try and get 13" of travel from a 10" travel frame/swingarm setup (I'm just using the HL500 as an example not trying single them out).

  ;)

 Twist my arm and I'd take it as it is but lower the thing and loose the yellow fork legs.  :)
Title: Re: Yes please...
Post by: BultacoMacca on July 22, 2012, 09:38:20 am
It looks like a Mk15 420cc Pursang, or is a nice copy of one. The last Bultaco produced.
All the pictures I have are showing slight differences to this one, like swing arm, frame brace, painted engine (not even considering the Exh pipe & odd front brake on it), but then I'm not even sure any were made for actual sale.
Title: Re: Yes please...
Post by: Montynut on July 22, 2012, 09:56:35 am
I think Mk15 125 & 250s made it to market but not sure about the open class bikes. It was domestic market only for the few that did make it I believe. Pictures of the 125 I have seen show it to be  afantastic looking bike and still shows that the engineers at least were looking ahead. I'll have to try and find the photos.

http://ozvmx.com/community/index.php?topic=8235.0

You are right the Aluminium swingarm looks like it is off a single shock bike modified to fit as the shock mounts look added on and the brace in front of the wheel seems to be for some sort of linkage.

The front wheel looks very much like the 'assemetric' fronf brake and wheel from my VG414 Monty with a mount plate to adapt to the Simons forks (I assume they are genuine) and yes Ross very yellow.
Title: Re: Yes please...
Post by: vmxken on July 22, 2012, 10:00:39 am
The builder of the bike contacted the magazine over a year ago and we've been trying to feature it ever since.  So far though he has only sent us low res images not suitable for publication.  It will happen.

Ken
Title: Re: Yes please...
Post by: TooFastTim on July 22, 2012, 10:25:36 am
Quote from: BultacoMacca on July 22, 2012, 09:38:20 am
It looks like a Mk15 420cc Pursang, or is a nice copy of one.

It's definitely a copy. The MK 15 used a completely different motor. That motor is probably a mk12. It's a real Mk15 tank though.

Quote from: Montynut on July 22, 2012, 09:56:35 am
I think Mk15 125 & 250s made it to market but not sure about the open class bikes.

Is that right? I wasn't sure if they ever made it to production.

I found the pic on Hugh Weavers facebook page (just search for Bultaco).
Title: Re: Yes please...
Post by: Stan S on July 22, 2012, 10:51:47 am
from left to right Mr. Nomen Albert, sr. Oriol Puig Bultó, sr. Randy and Mr. Munoz. Francisco Valera "Bamby".
MK15 420
(http://i991.photobucket.com/albums/af39/gf079/MK15420.jpg)

(http://i991.photobucket.com/albums/af39/gf079/pursang_420_mk15_1980.jpg)
Title: Re: Yes please...
Post by: VMX247 on July 22, 2012, 11:09:53 am
Perfect Stan  8)
As mentioned above, way too much slop/distance in the swingarm and front sprocket.  :(
cheers us2
Title: Re: Yes please...
Post by: Montynut on July 22, 2012, 11:21:32 am
Quote from: TooFastTim on July 22, 2012, 10:25:36 am
Quote from: BultacoMacca on July 22, 2012, 09:38:20 am
It looks like a Mk15 420cc Pursang, or is a nice copy of one.

It's definitely a copy. The MK 15 used a completely different motor. That motor is probably a mk12. It's a real Mk15 tank though.

Quote from: Montynut on July 22, 2012, 09:56:35 am
I think Mk15 125 & 250s made it to market but not sure about the open class bikes.

Is that right? I wasn't sure if they ever made it to production.

I found the pic on Hugh Weavers facebook page (just search for Bultaco).
I found a photo with more than one 125 in a domestic (Spain) race some time ago while looking for other stuff but I can not find it know. Maybe they were the Bully team bikes not production bikes but at the time it looked like production as the riders were all in different riding gear. I'll have to keep looking.

I miss the days when there were so many interesting brands and all so different in design  :'(
Title: Re: Yes please...
Post by: TooFastTim on July 22, 2012, 01:29:50 pm
Just re-reading my last post and I realised that my statement could easily have been misunderstood as sarcastic. I really don't know how many, if any of the MK15's made it to production. The question "is that right?" was genuine and had no underlying tones. I think I'm already in trouble for my sense of humour in this forum already (sorry Jared..)
Title: Re: Yes please...
Post by: maico police on July 22, 2012, 01:55:23 pm
Actually it's a shame to have bastardised such a rare bike (as a newly converted fan to black rims on my yz H, I find they look a little hideous on that thing :()
Title: Re: Yes please...
Post by: Montynut on July 22, 2012, 01:55:43 pm
No it wasn't taken as sarcasm. I put in my earlier post that I think they were production bikes hoping someone would confirm or otherwise. I hope they were. A lot of stuff was happening in Spain in '79 to about '82 with companies trying to hang on with finally only Montesa staying afloat due to the Honda take over in '81.

Those Mk 15 Bullies are certainly great looking and shows that it was not the ideas, flare or passion that stopped just the money and economic circumstances. Bugga ::)
Title: Re: Yes please...
Post by: mposs on July 22, 2012, 04:05:53 pm
(http://i574.photobucket.com/albums/ss185/mposs/IMG.jpg)
Title: Re: Yes please...
Post by: maico police on July 22, 2012, 05:12:51 pm
The countershaft sprocket on the mk15 in the brochure is a lot closer to the s/arm pivot than on the featured bike. I think it's a bitsa.
Title: Re: Yes please...
Post by: Moto on July 22, 2012, 05:58:36 pm
The frame and air box are standard Mk 12 pursang.The engine is probably the same.All the later model mx engines were the same except for bore size.This one has a late model Sherpa ign cover on it.
 The Mk 15 engine was completely different to the older engines,it was based on a Suzuki ? The frame was all new as well.
Title: Re: Yes please...
Post by: mainline on July 22, 2012, 09:11:30 pm
Quote from: Mont on July 22, 2012, 05:12:51 pm
The countershaft sprocket on the mk15 in the brochure is a lot closer to the s/arm pivot than on the featured bike.

Only by 175mm or so I reckon, 7" in ye old speak.
Title: Re: Yes please...
Post by: Montynut on July 22, 2012, 09:55:35 pm
Thanks mpos looks like they are productioin models but how many made it to market I wonder
Title: Re: Yes please...
Post by: TooFastTim on July 23, 2012, 04:35:50 pm
Quote from: VMX247 on July 22, 2012, 11:09:53 am
Perfect Stan  8)
As mentioned above, way too much slop/distance in the swingarm and front sprocket.  :(
cheers us2

Wouldn't that also have been a problem with the early long travel Maicos (e.g the Weil reps). Firko? Any Maico fundis?