Dellorto 25 on J125 TZR conversion. Help needed.

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Dellorto 25 on J125 TZR conversion. Help needed.

Postby Supereibar » Wed Feb 22, 2012 1:39 pm

Maybe someone can help me. The idea is to fit a TZR piston on a J125 barrel. Then I know I will require an intake manifold which presumably would be a one off?? Any ideas on this? Then I would need to fit a Delly 25mm on it and I have absolutely no clue on how to jet it propperly. Does any charitable soul out there have a slight idea of what do I need to find and is willing to post it? A shopping list would be interesting and much appreciated.

All the best,

J.
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby e type » Wed Feb 22, 2012 8:44 pm

Hi j I am looking at manifolds too as its all I need to finish the engine I was going to use a lammy 150 inlet of mb for phbl 25 it may need holes slotting slightly but it should fit as others Before us have have used 150 inlets on these 125/130/140 Vegas but if anyone knows a better way I would be interested too
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby wack 63 » Wed Feb 22, 2012 10:55 pm

I used a 150 manifold ported out to match a PHBL 25.As for jetting I would have to look in my book or you could try Dave Thrackway as he knows his Luna stuff http://lunaownersclub.lifediscussion.net/
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby e type » Wed Feb 22, 2012 11:03 pm

Wack if you do look in your book about the jetting could you post it up here as I will need this info too please
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby Supereibar » Thu Feb 23, 2012 1:03 am

I asked David about that many moons back.. But we never conclude the conversation. I wonder if he could share his secret with us. That would be brill.
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby wlightning » Thu Feb 23, 2012 7:18 am

I think I used a 150 manifold which chalky opened out for me, had a collier sweated on and run a 25 or 26mm mukini had it on dyno to set up
but moved needle.

Carl
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby Supereibar » Thu Feb 23, 2012 2:07 pm

you boys with your mikunis.... So, a 150 manifold MIGHT work then, you reckon?
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby thackers » Fri Feb 24, 2012 10:25 pm

Hi Jamie, I'm in the garage tomorrow so i'll take some photos of the inlet and the rubber connector. I'll also jot down the carb settings which were done when i had it dynoed. I had the barrel tuned by Mick Abbey and i've got his calculations etc i'll dig them out and post them up. I did post them ages ago, perhaps on the old LCGB forum but i can't get my link to it to work. Like i say im in the garage so i'll post up the info this weekend
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby e type » Fri Feb 24, 2012 10:37 pm

What sort of tune did mick do ?
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Re: Dellorto 25 on J125 TZR conversion. Help needed.

Postby paddyfitz » Wed Feb 29, 2012 6:14 am

Dellorto 25mm jetting...
On that setup...
I'll take a wild stab in the dark.
I'd start with a D29 needle 2nd clip up from the taper, 266 tube, idle jet of 52 & a main of 110 & see what it does.
Might be good. Might be way off. Gotta start somewhere. :fb:
Maybe put a larger aperture float needle valve in there to be on the safe side. 250 or 300 depending on your level of overall paranoia.
Saw a link with someone using an LTH reed manifold on one. Might be interesting? Might make the jetting a little more forgiving.
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