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ducatipaso.org • View topic - Mikuni experts, your answers please...
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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Sun Jun 02, 2013 9:17 am 
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paso grand pooh-bah
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Location: southern Germany
model: 750 Paso
year: 1987
do the cables have a bent plastic tube on its end ? Some have and if they do they will only fit with certain throttle grips. I guess you could take your throttle cable to a bike shop and just see what they have.


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Mon Jun 03, 2013 7:04 am 
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Location: Perth, West. Australia
model: 906 Paso
year: 1989
I'll get some cables made up from the local bike shop, no drama.
Got it goin today.
http://youtu.be/iI80jPLB97U

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89 Dark Blue 906 Paso
Ducati Paso, It's an 'understanding'....


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Tue Jun 04, 2013 12:22 pm 
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Location: Perth, West. Australia
model: 906 Paso
year: 1989
Well, getting one made up from the local bike shop WAS a drama as they don't make cables anymore. :oops: there is a place in Welshpool that does make them up...but it'll take two days and cost $100 for the two cables. Then I realized...the carbs came from a TRX850... which shares the same engine with the TDM850...same carbs, longer cables :thumbup: So I rang the wreckers, they had a pair and a twist grip from same bike for $50. Sweeeet. They are 230mm longer than the 900SS ones I have that are too short so should be long enough. I'll nip over there in the morning and pick em up.

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89 Dark Blue 906 Paso
Ducati Paso, It's an 'understanding'....


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Wed Jun 05, 2013 12:34 pm 
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Posts: 258
Location: Perth, West. Australia
model: 906 Paso
year: 1989
Mikuni conversion complete. :thumbup: :beer: :beer: :beer: OMFG what a transformation. I haven't got the pod filters on it yet and it was dark when I finished so didn't want to go too far with no indicators but the little joy ride I just went on made all the dramas worth it. There is instant throttle response with no flat spot whatsoever. I can decelerate on approach to a roundabout with no stumble, just smooth engine braking, then I can potter around the roundabout (small, single laned) in 2nd @ 2000 rpm, still no stumbling, then I can accelerate out of the roundabout with no flat spot, just smooth acceleration. Then when I stop and go again WOT it just goes from 1200 to 8000 instantly, no fuss, no cough, no flat spot just a big kick up the arse with the front wheel lifting off the road. :lol: :lol: :lol: :lol: :lol: Goes like a 900SS.

So, I thoroughly recommend doing the mikuni conversion...BUT, if you decide to do the same I would advise using a carb from a 900ss not a Yamaha (TRX/TDM) as the cables come in from the back which creates its own dramas. I managed to get around them by using longer cables but its just so much easier to go with Ducati from the onset.

It pays to strip the them down and kit them (or just get one from Gerhard :thumbup: ) and clean them and check everything is where it should be. First start up saw the bike running on one cyl. at idle and then the other kicking in when throttle opened. I thought this was just a balancing issue but it turned out there were bits missing! (A small jet buried deep in a foxhole next to the main jet was missing, is this the idle jet? or is that the larger jet with a screw slot in top in the same group of three? Dunno, doesn't matter) I only knew there was something missing when I looked in the other one! Luckily my mikuni came with a spare (thanks Dan)

I had stripped the head of the mixture screw and couldn't get to it to re groove, so I drilled 3 very small holes in a row in the head so I could get a screwdriver to turn it. Got it out, ditched it and replaced with a good one from the spare carb. I replaced the little o rings as well, as the DJ kit came with a bunch of little o rings :thumbup: I wound both out 3 and a half turns.

Thinking I had covered everything, I put it all together on the bike including tank and seat and went for 2nd start up. She burst into life and all was looking good for a test ride. As I was wheeling it out of the garage I noticed fuel pissing out and onto the floor :mad: it was coming out of the overflow on both carbs. I'm still running the electric fuel pump so I removed the restrictor jet in the return line and now no more leak :thumbup: I will be using the vacuum pump I got from Gerhard (thanks again G.) but the electric one works so for now it stays.

I still have so much more to do but now it's goin so good I just want to put the fairings back on and ride it...so I think I will :lol: We still have some riding weather here in West Oz before the wet stuff sets in so I'm gonna go make hay........

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89 Dark Blue 906 Paso
Ducati Paso, It's an 'understanding'....


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Wed Jun 05, 2013 1:29 pm 
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paso grand pooh-bah
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model: 907 I.E.
year: 1992
sounds like you have the carburation working well
post another vid when its on the road :thumbup:

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...long live the square framed duc!

'92 907...numero 2046
'92 851...in progress


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PostPosted: Wed Jun 05, 2013 4:07 pm 
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Location: southern Germany
model: 750 Paso
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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Wed Jun 05, 2013 10:10 pm 
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Joined: Tue Jan 17, 2006 12:00 am
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Location: Lower Hutt, New Zealand
model: 750 Paso
year: 1986
Lane,

Welcome to the world where the Paso will perform as designed. Your Mikuni setup transforms the performance. Has the same experience with my P750.

Cheers,
Fraser.

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1980 Moto Morini 500 Sport
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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Thu Jun 06, 2013 12:57 am 
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Joined: Thu Sep 20, 2012 11:48 am
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Location: Perth, West. Australia
model: 906 Paso
year: 1989
:cool: thanks Fraser :thumbup: she's certainly a different machine. I'm glad they put mikunis on the SS and the monster of the 90's, or they wouldn't have sold many :mrgreen:

Gerhard, thanks for your help in this operation (he PM'd me a lot) you are very unselfish with your time and your wisdom :thumbup:
It was No. 8, the idle jet that was missing. One cyl was flooding then coming to life when throttle open. Probably why there was so much smoke too, unburnt fuel.
Both inlet tubes had two holes each. Three were plugged and one has the vacuum pipe goin to digiplex.
In the mixture screw combination it went; main screw, spring, washer then rubber oring to seal :thumbup:

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89 Dark Blue 906 Paso
Ducati Paso, It's an 'understanding'....


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Thu Jun 06, 2013 6:35 am 
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Joined: Thu Oct 27, 2011 7:47 am
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Location: Wollongong,Australia
model: 750 Sport
year: 1988
G'day Lane,
that's a fantastic job.When I had my 750 Paso I put 40mm Delortos on and like you I was thrilled with the difference it made.Nice video too.Seems you dye your hair the same colour as me :lol: :lol: :lol:

Cheers
Andrew


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Thu Jun 06, 2013 8:52 am 
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Location: Perth, West. Australia
model: 906 Paso
year: 1989
Nice video too.Seems you dye your hair the same colour as me

Ha ha, yeah it comes in a bottle called "Three teenagers" :mrgreen: :mrgreen: :mrgreen:

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89 Dark Blue 906 Paso
Ducati Paso, It's an 'understanding'....


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Thu Jun 06, 2013 1:00 pm 
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Location: Denmark, Western Australia
model: 906 Paso
year: 1989
Love the " stop filming thats a rap" hand signal at theend of the youtube clip as well mate very professional haha. Good to see it worked out well there lane1 i have my golden tyres fitted now and next step is belt replacement and the same carb conversion , cant wait :lol:


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Thu Jun 06, 2013 1:03 pm 
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Joined: Thu Sep 20, 2012 11:48 am
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Location: Perth, West. Australia
model: 906 Paso
year: 1989
Mate, you'll love it :thumbup:

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89 Dark Blue 906 Paso
Ducati Paso, It's an 'understanding'....


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Fri Jun 07, 2013 5:38 am 
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Joined: Thu Oct 27, 2011 7:47 am
Posts: 497
Location: Wollongong,Australia
model: 750 Sport
year: 1988


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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Fri Jun 07, 2013 9:06 am 
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Location: Perth, West. Australia
model: 906 Paso
year: 1989
Half strength :D you'll probably start gettin your colour back soon :lol: :lol: :lol: :lol: :lol:

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89 Dark Blue 906 Paso
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 Post subject: Re: Mikuni experts, your answers please...
PostPosted: Fri Jun 07, 2013 9:43 am 
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Location: Wollongong,Australia
model: 750 Sport
year: 1988


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