Will I get my 100 ready in time for Taupo?

[James Deuce]

I'm wondering if the thread title is referring to Taupo's next eruption, or not?

[F5 Dave]

ahh, Jim, well that could be anytime so I figure I better hurry.

yes the thread has morphed but I thought it amusing to keep teh same one going as the GP has been at Taupo a few times & I haven't been ready (till last year).

[James Deuce]

Thank you for clearing that up.

[husaberg]

Thanks, A mate has some magnesium Dellortos, but I'm not prepared to go buy another set of jets. I have Keihin & Mikuni already. Problem with the Honda carbs is they run that silly double cable setup & the pulley is too tall, the shock sits right above & it is currently touching. I have a stack of 28s, but they are a bit small for what I want. Can take them out a mm.

What did you run on the mb5 framed RG later framed bike.

The clearance i can empathise with after my TZR carbed H100 having to remove the carb to alter the needle and so forth is the height the issue with the current set up.

From left field what about a pumper no space problems or main jet issues there a mate had one on his Mb100 and it was super.
It had a few issues on over run but it was a vast improvement on his vm28 he had prior he was a kart guy and had the touch with the carb though.
I think i know how to solve the overun issues now.

Just to make Grumph jealous i know where there are two SS35 Dellortos not being used.
The only Delloroto have have used was the old 70's square never done much other than clean them.

Anyone have an idea what the TZR250 V twin carbs are like?
Are they down draft i had a quick look last night but didn't see a picture.
What model RGV carb do you have Dave at the moment.

Wob had something about modding some carbs for downdraft somewhere as well.
There is usually a Lectron or EI on Trademe most of the time too.

[F5 Dave]

What did you run on the mb5 framed RG later framed bike.

. . .

erm, not me. Had an H with heaps of room, but that ran a 28.

Don't want to run queer carbs that are unknown & have no jet backup, or at least would cost me to re set up. I've thrown $$ at jets over the years. I have a VJ21 32mm. If I ran some queer carb I'd never know if it is what is holding me back.

[husaberg]

erm, not me. Had an H with heaps of room, but that ran a 28.

Don't want to run queer carbs that are unknown & have no jet backup, or at least would cost me to re set up. I've thrown $$ at jets over the years. I have a VJ21 32mm. If I ran some queer carb I'd never know if it is what is holding me back.

Neither of the pumper or Lectrons have jets.

I haven't heard of the Lectrons slowing down, well anything inc Tz250s and the pumper carb well, have a look at TZ's dyno stuff with his is a baby 24mm imagine the drive-ability of a 34mm.

Also the nsr250 carb can be mirror so the linkage is on the otherside. So the side clearence may not be that much of a issue.

So you didn't have a mb5 framed 100 and then a rg50 framed 100 were they mb50 engined.?

[Kickaha]

Anyone have an idea what the TZR250 V twin carbs are like?

Well the V Twin TZ250 aren't a downdraft so I doubt the TZR 3XV carbs are

[Grumph]

Just to make Grumph jealous i know where there are two SS35 Dellortos not being used.
The only Delloroto have have used was the old 70's square never done much other than clean them.
.

Ha, so do I...and my name is on one of them for the Rudge. plenty of them around if you know where to look. The speedway ESO's that arrived here new all had SS1 35's on - and they were immediately pulled off and bloody concentrics bolted on.

Dellorto jet sizes are simple - straight millimeters. #50 idle jet = .50mm #165 main = 1.65mm Wish i had a buck for every dellorto jet I've made.

[husaberg]

Ha, so do I...and my name is on one of them for the Rudge. plenty of them around if you know where to look. The speedway ESO's that arrived here new all had SS1 35's on - and they were immediately pulled off and bloody concentrics bolted on.

Dellorto jet sizes are simple - straight millimeters. #50 idle jet = .50mm #165 main = 1.65mm Wish i had a buck for every dellorto jet I've made.

So is that where they probably come from.

Consentrics that kept Pat Thackwell in pocket money for years. Alloy in alloy for the slides. Top idea to finish of the design the Amal factory decided to make them out of recycled fry pans as well. I suppose they were cheap for BSA and Triumph. Same because the Monoblocs were well made and the TT's and the GP's were beautiful.
I had never seen them on anything other than the 60's Italian racers i always wondered cause i knew they weren't off a machi so why don't the CHCH machi bikes have them?
PS what happened to Gourlays one was it ever finished i can't remember it racing is he still around. Was Boat surveyor or similar

I know the Dellorto parts are half the price than the webber stuff for cars.

[koba]

Wish i had a buck for every dellorto jet I've made.

I started making a jet set for Mikuni Hex type jets.
Even made a flow rig out of an old carb to (unscientifically) test the flow rates.
Got a few done, attention span was spent, shelved until the time when I need more jets and have less disposable coin and more disposable time.

[husaberg]

I started making a jet set for Mikuni Hex type jets.
Even made a flow rig out of an old carb to (unscientifically) test the flow rates.
Got a few done, attention span was spent, shelved until the time when I need more jets and have less disposable coin and more disposable time.

The burgerman site http://www.nitrous.info/nitrous-solenoid.htmspells out how he does the webber style ones out of alloy cheese bolts i think.

They were for the nitros and fuel jets.
Yes i know the proper ones are the best-est most consistent.
i used to have a large genuine set all housed on nice little multi compartment boxes I wonder what the chances are of finding them in the old mans shed are?

[koba]

I wonder what the chances are of finding them in the old mans shed are?

It is good when old men are tolerant with the use of sheds.

I built the flow rig thing to be adjustable (its way more simple than it sounds in my descriptions) so I could calibrate it against a set factory jet. It seems repeatable with the calibration jet. My scale may not be the same as Mr Mikuni intended but it should be a consistent step up or down in CC per min at x (the calibration bit required) head.

I have no idea if it works properly yet and probably never will as I've managed to klepticly acquire a multitude of jets since then.

[Grumph]

We don't use the SS Dellortos on Macchis in this country because they're a bloody hard carb to set up - and the later pumpers are legal for pre 72 in NZ...I spent a Friday at Puke the year the MV six came out setting up Andy Gourlay's SS1 on Alky. Moving the float bowl height in .015in increments was tiring shall we say....
On the dummy grid an ex works mechanic with the MV came over..."scusi,scusi" grabs the running Macchi, leans it left and right - revs go up and down - offset float bowl, goes lean/rich - hands it back smiling "bene, bene, ver good !! " For one frightening moment I'd thought he wanted help with the MV...six SS1's with float bowls stuck in everywhere. Every time it leaned more than about 15 deg from the vertical it missed like a bastard.
Apparetly Dellorto wouldn't make them concentric type race carbs like the Keihins on Hondas....

Andy's still around in Akl - the bike is the one Barry Gurdler owns - and he let the Hoagys start off on it too. They're his nephews.

I found a chart on the net somewhere with comparative jet sizes - quite useful except it was in imperial bloody sizes.

[F5 Dave]

Anyways, I'm not using any queer daigo carbs, or buying jets, or making them. I am short on time & money but do have Kei & Mik jets. The Mik carb is quite short, keihin still taller by looks.

I had an MB5 framed MB5 if that helps. And an RG50 framed RG50.

[husaberg]

We don't use the SS Dellortos on Macchis in this country because they're a bloody hard carb to set up - and the later pumpers are legal for pre 72 in NZ...I spent a Friday at Puke the year the MV six came out setting up Andy Gourlay's SS1 on Alky. Moving the float bowl height in .015in increments was tiring shall we say....
On the dummy grid an ex works mechanic with the MV came over..."scusi,scusi" grabs the running Macchi, leans it left and right - revs go up and down - offset float bowl, goes lean/rich - hands it back smiling "bene, bene, ver good !! " For one frightening moment I'd thought he wanted help with the MV...six SS1's with float bowls stuck in everywhere. Every time it leaned more than about 15 deg from the vertical it missed like a bastard.
Apparetly Dellorto wouldn't make them concentric type race carbs like the Keihins on Hondas....

Andy's still around in Akl - the bike is the one Barry Gurdler owns - and he let the Hoagys start off on it too. They're his nephews.

I found a chart on the net somewhere with comparative jet sizes - quite useful except it was in imperial bloody sizes.

Dellorto jet sizes in imperial i guess only a pom would do that.
The greatest thing i have found with the Italians is they were able to understand and use metric and someone, i guess a pom goes and f's with that too.

Weird thing is i would have thought the MV would have shared the floats bowls there was a trick for the twins and singles by effectively using/Sharing two then no problems? Seen it somewhere. Tuning for speed? Classic Racer?