OzVMX Forum
Marque Remarks => Spaniards (Bultaco, Ossa, Montesa etc) => Topic started by: Tahitian_Red on June 14, 2011, 01:49:08 am
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I finally got to race one of my Phantoms a few weeks back, at Brad Lackey's Nor Cal Classic. I raced a loner Phantom last year, when this one was totally flooded out from a leaking petcock, but nothing like tearing it up on your own bike. If you ever get a chance to race one don't pass it up. They are so nimble and sweet handling!
;D
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN1333.jpg)
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They are so nimble and sweet handling!
;D
A good chassis and light weight I take it.
Whatcha reckon, more the light weight or more the chassis?
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Since the last Vintage bike I raced was a 74 TM250 (prior to a Phantom), the weight seems to be the most impressive thing. It went where ever I pointed it and probably would have it is was 15 lbs heavier. As with most great bikes, it's probably the totally well thought out package that gets the job done.
;D
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Cool! So what carby are you running? How does the motor feel? Peaky or broad power? Plenty of horses? I can't wait to get stuck into mine.
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Since the last Vintage bike I raced was a 74 TM250 (prior to a Phantom), the weight seems to be the most impressive thing. It went where ever I pointed it and probably would have it is was 15 lbs heavier. As with most great bikes, it's probably the totally well thought out package that gets the job done.
;D
Thanks Red. Comments like that give a good 'feel' for the bike and to understand if the reputation is real or BS :P. Thanks again 8).
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Cool! So what carby are you running? How does the motor feel? Peaky or broad power? Plenty of horses? I can't wait to get stuck into mine.
Brad,
I'm running a 34mm Mikuni. I think the pilot jet was a little lean and it is definitely geared tall by a few teeth, so I had to keep it wound up. The loaner Phantom I raced last year was strong off idle and through the mid-range. It was stock except for a Circle F pipe and jetting changes.
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Hey Brad
The Phantom just grows on you as a race bike
Run a 38mm Mikuni for vmx. The 34mm is way to small for the Phantom models
Cheers
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A 38mm on a 250? A bit big don't you think? I wouldn't want to fit something that big on it.
I will try the bing first and see how it goes.
I'm keen to get it out there to see how it feels and to put a bit of exotica on the track rather than just another green stripe.
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i'm running a 34mm dellorto on my phantom (barrell ;D),but then again i'm not reving the begeezas out of it ;), :P
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The GP2's came standard with a 36mm bing
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I was told the Bing 36mm flows similar to a Mikuni 38mm, but I always go conservative on carburetion. (My Can-Am MX6 250 runs a 34mm Mikuni and my Can-Am engine guru said I would love it with a 32mm.)
I'm sure the Phantom would make more upper mid to top end power with a 38mm Mikuni, but I would never really use it, being a Novice. Another concern for me was the Phantom's reputation as a "Wheelie Machine" and the 34mm does keep the front end down better.
We all have different skill levels and powerband needs, so to each his own. :)
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Although I don't own or run a Phantom I'm with you Red. The smaller the carb more bottom end and mid-range, and the more tractable and controllable the delivery and drive.
A 34mm Miki sounds about right to me. You could try a 36 or even 38 but for most mere mortals at MX I would expect a 34 to give the best results in the most situations, and there would only be a poofteenth at the top end anyway.
On hard packed MX circuits and Dirt Track the 36 or 38 might start having advantages.
I think carby size is associated with Penis Envy :D. Carby size was definitely part of masturbation marketing back in the day :o. ;) ;D.