Mikuni jets

[persempre907]

You bet, as Nicola told, the Weber carb also makes go the Paso faster

Ciao

[Finnpaso]

... with "flat spot"...

[silverfox]

Be careful, Dyna jet numbering (124,128 for stage 1) is NOT the same as Mikuni.
A 140 Mikuni I believe is 1.4 thou of an inch - Dyna jet use their own measuring system.
Don't forget that the needles with the Dynajet kit are a totally different profile designed to work with dyna jet mains.
I used 124 but with open exhaust pipe and pod filters is wasn't enough. The 128 works well. No flat spot.
Needle clip 3 positions down and idle jet 37.5 (I mucked around for ages with 40.0,42.5 - but they are way too rich)
Float level 14mm
AND SYCH THE CARBS !!!!!!!!!!!!!!!!!!!!!!!

Tony

[Finnpaso]

Very usefull info!!! So, it seems, that normal Mikuni jet sizes are totally different, than Dynojet kit jets! Just that can explane that big diffrence between "sizes"... Those original needes were also totally different looking(much thicker), than Dynojet needles(what i put inside with new lighter Dynojet springs). So, seems, that i have to open them again and put those Dynojet jets. I must propably look jets closer by eyes to see, is there big difference.... THANKS! Sync is very easy job to me

[Tamburinifan]

So, it seems, that normal Mikuni jet sizes are totally different, than Dynojet kit jets! Just that can explane that big diffrence between "sizes"...

Here ya go:

Mikuni / Dynojet Size Comparison Chart

Mikuni Dynojet
140 149.3
150
142.5 152.0
145 154.7
155
147.5 157.3
150 160
152.5 162.7
165
155 165.3
157.5 168.0
170
160 170.7
162.5 173.3
175
165 176.0
167.5 178.7
180
170 181.3
172.5 184.0
185
175 186.7
177.5 189.3
190
180 192.0
182.5 194.7
195
185 197.3
187.5 200
190 202.7

DynoJet jets are marked according to the diameter of the hole in the jet. i.e.: DJ150 = 1.5mm and DJ175 = 1.75mm.
Mikuni jets are marked according to its' flow rate, i.e.: 150 = a rating of 150 cc of fuel per minute.

[Finnpaso]

Thanks Gert, Nowbody told this earlier? How about smaler sizes, like Dynojet 128 and 124 compared to Mikuni jets?

[eliatt]

Hi,
You can tell from the chart that the rate flow/diameter ratio is liniar. so you can calculate the required size.
So, DJ 128 should be Mik. # 136.5.

[paso750]

Nowbody told this earlier?

that Dynojet and Mikuni jets are not compareable was said on the first page of the thread already and the Mikuni/Dynojet comparison chart was also posted already some time ago (or was it a link to it ?!)

G.

[Finnpaso]

Sorry, Gerhard, i missed that Your early post, sorry... And i missed also that comparation chart, or was it link to it....

As You know, i am virgo(very accurate), but not so accurate, as Germans