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Used Montesa 360 side port Head, Barrel and piston.
Suitable for VA but will also fit earlier VR and V75 I believe. Will swap over and bolt straight up to the 250 bottom end. Will fit the period 250 enduros as well I believe.
(http://i323.photobucket.com/albums/nn458/mx250syd/montesa/barrel2.jpg)
(http://i323.photobucket.com/albums/nn458/mx250syd/montesa/barrel.jpg)
I'm expecting top dollar unfortunately. I'm actually being fatalistic coming to a decision to restore a side port 360 enduro out of the bits I have, or a H6 based 250 reed valve. If this sells for good money I'll restore the H6. If it doesn't I'll offer the 250 reed valve barrel head etc.
$300 ono. (A new piston, if you can find one, will cost that).
Additional pixies available, just ask.
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MX,
I didn't think Mon made a side-port 360 Enduro. Are you turning a VA 360 engine into an enduro?
And I'm fairly sure a 360 top end won't bolt straight on a VR/V75 bottome end. The cases would have to be machined out & I think the stud spacing is different. VR/V75 studs are 70x70mm. I think the VA360 studs are about 78x78mm.
Also the VR250 rod only takes a 16mm dia gudgeon. I'd be very surprised if the 360 piston uses the same size.
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360 has an 18mm pin from 77, not sure about the VA.
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If I get stuck with these parts I was going to play mix and match with VA cases, crank, this barrel and head with H6 6speed box, slotted into an early side port frame. I'm not 100% sure it all will work or fit ::).
I like this combo for appearance. Should end up with something for Vinduro looking like....
(http://i323.photobucket.com/albums/nn458/mx250syd/2255_1.jpg)
I offer the barrel head and piston here in case someone else would like a lash at a Monty bitza special ;).
If I go 250 reed valve it should end up like .....
(http://i323.photobucket.com/albums/nn458/mx250syd/enduro360h679cmaslg6.jpg)
I have the making of a 6 speed 250 in a H6 frame. Got forks for H6 but will need wheels +++ for both projects.
I won't be doing both ;). I've got to get a little disclipline (one project at a time ::)) a little 'elbow room' in the garage, and a little finance to put into the other projects 8). As I said, Im being fatalistic letting the market dictate to me :P.
I'll give things a few more days here and then try EvilBay ;D.
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G,
I think yr mix & match w sideport barrell, VA cases & H6 enduro g/box will work, so long as they're 360VA cases & crank/rod. Lyall O'Brien once told me the 5sp enduro g'box goes straight in & the 360VA cases go straight in the VR/Enduro frame.
In fact Lyall also told me he sold many of the VA360's converted to enduros w enduro g'box.
I am a bit interested in yr barrell & head. Can you measure the stud spacing on the barrell for me pls & the OD of the skirt at the bot of barrell.
BTW is that a hairline crack on the piston to the left of the boost hole? Or just a hair/mark.
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BTW is that a hairline crack on the piston to the left of the boost hole? Or just a hair/mark.
Dog hair - I've got a Husky and both she and the barrel shared the back seat for a while ;). Just got back from my bushwalk with my 'personal trainer' - she doesn't let me forget ;) ;D.
(http://i96.photobucket.com/albums/l187/mx250a/DSCF0018.jpg)
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I think yr mix & match w sideport barrell, VA cases & H6 enduro g/box will work, so long as they're 360VA cases & crank/rod. Lyall O'Brien once told me the 5sp enduro g'box goes straight in & the 360VA cases go straight in the VR/Enduro frame.
Maybe you shouldn't have told me that. Looking at that pixie and listening to you my imagination is starting to fire up :-\.
. Can you measure the stud spacing on the barrell for me pls & the OD of the skirt at the bot of barrell.
Studs are 76mm x 85mm. Hole 13mm dia.
Barrel 83.4mm top and bottom.
The history of the motor/barrel as I know it is that it was NOS out of Ryans. It went to Monty indentity Ron Merrit at Portland/Lithgow. It was put into a hybrid, the '6 foot' bike (it was TALL), and used a few times but been tall, a MX360 and a four speed mx box it was inappropriate on the steep shaley hills of Sunny Corner and quickly parked and forgotten.
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& the OD of the skirt at the bot of barrell.
Oppps. What was I thinking ::). You needed to know if it would fit into the cases; 92.3 mm OD. :)
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G,
Is the stud space 85wide x 76front-to-back or the other way around?
The 5sp enduro box has a massive gap between 1st & 2nd (37% drop) & fairly wide 2nd-3rd (31%). The 6 sp has much better gaps (as you would expect).
I think that the 6sp will fit wherever the 5sp does but it might be worth checking that w Jared.
That was probably the bike Ron Merrick lengthened the swinarm 4" for. Yes 100mm! Must have been a hill-climber. Can only guess how much flex it would have had tho cos it had no extra bracing. Likewise one can only wonder about the handling of such a bike w 60" wheelbase.
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85mm front to rear.
I asked Jared about the box sometime ago and he wasn't sure bit thouight it would.
So it was 6 foot long not 6 foot high.
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I just built a 360 VA motor and used the 5 speed trans from a VR.
It will fit, but you have to grind away some meat from the cases
to let 1st gear on the primary shaft rotate ok. Also a little has to
be removed from the area where the kickstarter gear goes.