OzVMX Forum
Marque Remarks => Spaniards (Bultaco, Ossa, Montesa etc) => Topic started by: lyle2212 on October 29, 2008, 03:32:38 pm
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Does anyone know where I can lay my hands on an air filter box in any condition for a GM frontera??? I have tried Don newell and Peter shoene, no luck there.
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G`day if you can borrow one should be able to get it copied 07 3821 6777
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Is that GM as in General Motors ???.
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No, thats GM as in "greatest motorbike".!
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No, thats GM as in "greatest motorbike".!
Sounds more similar to 'Great Mistake' ::).
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3.112 posts per day by mx250,and how many of those would be constructive????? Anyway ol mate, go to "general disscussion" where I have left something constructive for you to ponder, regards lyle.
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Might be worth trying Anthony Suttor at Vintage Dirt. His number is 02 6366-0138, he might be able to help.
Cheers,
Mark
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3.112 posts per day by mx250,and how many of those would be constructive????? Anyway ol mate, go to "general disscussion" where I have left something constructive for you to ponder, regards lyle.
Go to hell Lyle, and lighten on the way through. To arrive at hell in your mood would spoil the atomsphere and give the place a bad name.
There would be no forum if people only used it at the rate of .163 per day to suck it dry of info as they saw fit .
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lyle the gm is mk 10 pursang , but what u do is get some sheet metal (colour bond offcut from roof manuf. ) i used some stainless , cut it wider than the frame , make it in two pieces , the top with two tabs bent square down , the main part , goes down then follow the profile of the frame , then up , trim it to suit , it is easier to make a template from stiff card , stick it in the frame then scribe it to the outside of the frame where it seals up to the sidecovers , get the rubber from don , cut a hole in frount to suit bigger than the rubber , sica it in ,it is easy but have a play with some card , i,ve done two in my frontera,s
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I have considered making one,so if I can,t find one then I suppose that will be the answer,thanks to all replies. Even you mx250 and don,t forget a happy pill.
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ive got a gold medal 370 yeah its the same part as a mk10 pursang vintage dirt can help you
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OK boys lets get the info correct.
If it's a 250 the frame is a modified 180 frontera.The air box from a standard frame will not fit it needs to be modified.
The engine is a 192 pursang with frontera ratio's in gearbox but stamped 492.
It's the same with the 370, 181 frame, 193 motor, stamped 493.
The side covers on mine were originaly pursang from factory not frontera.
Anthony Sutter has an original 250 he may be able to help with an air box?
Don can help with the original rubber tube from air box to carby.
Good luck
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bullymad , if u see my post i have stated the mk 10 pursang air box is what lyle requires , the gm.s aren,t moded 180,s they are pure mk 10 pursang , ones that wern,t sold after mk11,s were released , it is easy to stamp a 4 over a 1 , he,s been given the correct info
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the mk9 and 10 250 frontera was based on the mk8 125 pursang frame ,that,s why a pursang tank is used , the big toolbox top one is too long for them , the mk 10 using the bultaco fork lowers , 360/370 used the larger frame , big tank with the mk10 using the big 38mm forks like the gm/mk10 pursang
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IMS i have both the frames your talking about.
It is a 180 frontera frame and not a 125 pursang frame even though they are very similar to each other. Check the weight of both and the tubes in the air box area.
The rear swingarm is mk10 250 pursang.
The frame is stamped 180 and the tank is mk 10 frontera.
The 125 pursang air box does not fit exactly and the 125 side covers don't fit?????
I hand fabed a plastic air box exactly to the original.
What would i know i only restored a 492 and 493 lol
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Lyle,
if your still chasing a pipe for your mk11, there's one here and lots of other stuff too
John
http://cgi.ebay.com/ebaymotors/1979-bultaco-frontera-mk-II-250-pipe-muffler-exhaust_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1208Q7c66Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318QQ_trksidZp3286Q2ec0Q2em14QQhashZitem330283968807QQitemZ330283968807QQptZMotorcyclesQ5fPartsQ5fAccessories
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There has been some misinformation here.
As I understand it, Mk 9 250/370 Fronteras (M152/143) were based on MK8 125/250/370 (M144/135/136) Pursang frame & swingarm.
MK10 250 Frontera (M180) was based on Mk9 125 Pursang frame, forks & swingarm, but diff sidecovers around airbox. (Maybe diff airbox too to make room for the battery)
MK10 370 Frontera (M181) was based on Mk9 250/370 (M167/168) frame & 38mm forks but MK10 style swingarm
My Gold Medal 250 Frontera was clearly a MK10 250/370 Pursang frame, swingarm & 35mm Mk10 Pursang forks but the frame was stamped w 180 prefix even tho it clearly was NOT based on the Mk9 125 Pursang frame. My GM engine # was 492 prefix as I believe they all were. As I recall airbox & sidecovers were straight MK10 250 pursang.
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Yeah I noticed that mk11 pipe on ebay,unfortunately it,s for a 250cc (m214) and I,m after the 370c(m215). There is one on ebay in spain ,though it,s a bit dinged up..... I rang the ol' mate from vintage dirt who is putting my mk11 seat together, and he can make me up an air box as he has the same gm frontera. ...I believe that VMX edition 20 or 21 has the info on the gm frontera and how they came to be, if memory serves me correctly they were indeed a batch of mk10 pursangs destined for the USA, but they had production delays, so to keep the peace with the buyer they made a few changes to them and thats how they came to be an enduro rather than motocross bike.
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jc ,u could be right on the 180 relationship with the mk 9 125 ,instead of the mk8, i definatly see one of them in my bike (180)dony has told me if i fit a mk7 swingarm it can be used in pre 75 , but he may think i have the mk9 frntera , as u can see the rest of my post agrees , the pursang mk10 with comp plate (aka gm ) frame in the shed is begging for a powerplant , actually both my 180 and 181 are in the pic from conandale vinduro close to the control building , red and blue
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Ims,
Yes I'm certain that the Mk10 Frontera 250 M180 frame is based on Mk9 125 pursang frame. I have it stated in the Mags of the day & I have such a frame in the shed & clearly its not Mk8 pursang & wouldn't be legal for pre75 w a Mk7 swingarm. The top shock mount is a lot further forward & seat frame-loop is diferent to Mk8 Pursang. Airbox covers different also
The GM 250 Frontera frames stamped #180 prefix (as mine was) is straight MK10 Pursang 250/370 - not even extra brakets for bashplate or centre-stand. Bashplate wouldn't have fit anyway as pipe was straight pursang pipe (w extra muffler attached to tip) which is quite a diff shape (esp under the engine) to Frontera pipe.
Is yr Mk10 frame w comp plate stamped 180 prefix or 492/493?
I think there may have been 2 batches of GM Fronteras w frames stamped different prefixs.
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mine,s stamped 180 and is dated 1978 ,i have the extra silencer on the mk10 frontera , thanks for the info on the 180 frame , donny must have mixed it up with a mk 9 , and it looks so much different from my mk 7 pursang
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The difference with the 250 Pursang/ Frontera frame thing is the width.
One may be a extract from the other but the fronty is wider in the airbox/seat area, thats why the Pursang airbox doesn't fit.
Floody told me that the only reason the GM came here was because when he was in spain at the factory he saw the first shipment
that was going to the US.
He told Bulto that he wanted some so they shortchanged the yanks and limited no's came here.
The original GM was created by 2 brothers Bultaco sponsered in California from a Frontera frame and a Pursang motor to compete in the six day.
They painted it gold because they were confident of winning the gold medal.
The bike did very well so the factory introduced it as a new model.
Some Australian bikes were supplied with Preston Petty bits.
The silencer on the pipe was due to pollution laws in the US