Who's the best carburetion guru of Lower NI?

**Beeza** · 12th June 2009, 21:58

I want to entrust my imported Laverda Jota 1000 with its 3 Dell'orto pumper carbs currently all set up for running at the thin 2000m+ altitude of the South African high veldt to someone who can rejet them properly for sea-level use, synch them and get the bike to start and run properly without flooding or sooting or oiling plugs or holing pistons.

Who do you trust and recommend? I'm located in Wanganui and would prefer help from inside a 100-120km radius if possible, unless a true carb Einstein means me taking a longer trip to get it sorted.

**F5 Dave** · 12th June 2009, 23:12

For a start rip out the emulsion tubes (& needles) & inspect them with real good light & magnifying glass if poss - just a bit of ovalisation will give you all those symptoms & you won't be able to jet to compensate. Dells tend to wear & obviously not a new bike so best place to start.

Erm all else fails the only chap near you I can think of (not being near to know) is Pete Sales at Total in PN. Whether he has an Dell parts I doubt but would be best seat of pants tuner I'd imagine.

**awayatc** · 13th June 2009, 00:11

Bike may run a bit lean,.....
Not only altitude that makes a difference, also temperature.
Lower altitude here means it would run lean.....(more oxygen)
colder air also holds more oxygen....(leaner still)
So you may need bigger jets, one size up would probably be enough.
Air/fuel mixture screw can can be turned in half a turn or so.
Balancing=adjust one carb, adjust the 2nd one of that, then the third....
But inspecting tubes and needles as F5 Dave says is probably your first and biggest step....
Maybe the bike has always been running to rich in S Africa.....?
Don't need to be to much of a Guru.....
pretty basic stuff for any competent bike mechanic realy
Good luck.

**Beeza** · 13th June 2009, 00:54

Great. I'm going to leave it all to a proper mechanic. And if it's one who's knocked around in the trade since longer than last year, he'll surely know how to source all the necessary parts to get the Jota waltzing sweetly. Dell'ortos aren't all THAT rare -- all the Italian bikes prior to the Magneti Marelli EFI in the late 90s used them. Some still do. And, as someone more used to Amals, the Dell'orto pumper carb is a magnificently-crafted piece of precision engineering by comparison!