jetting

Honestly i just dont want to blow it up when i start it to break the new cam in. And its a new carb also. I have tuned carbs before just not in this setting................ Russell's cam card at NR says 2000rpms for 20min. 420cc clone with cam, longer arc rod to bump compression a little...

I just re jetted my honda GC160 and it ran, but was not running good at all. I took off the air filter and ran it again and it still runs horribly, I put a 140 emulsion tube in with a .37 main jet in. I have no idea why it doesn't run correctly, I need some help

Just wondering if any of the clone experts have an idea where to jet my clone carb . My mods are . Engine Tec HS50 Cam dyno 255 Tec Motorsports coil Epoxied intake port reshaped Ported exhaust port Shimed stock springs So I got her running today , started on the second pull ...

I recently bought a kit from NR Racing and it came with a .37 jet. was wondering if I can actually use it with the 140 or if it is overkill. Any input is appreciated, thank you

Can you guys help me out with a few things I'm running a very good jetting for my set up Billet rod +10 Arc flywheel Black mamba cam Flat top piston 26lb springs 1.1 ratio champion shaft rockers Custom header 22mm mikuni Jet sizes are 130/17.5 Head is stock What could be...

I have a gx390 and it has a header and a airfilter kit what should I jet the carb to can anyone please help

Need help jetting my Mikuni VM22-133 for methanol. I'm collecting parts for GX200 clone that will need to run on methanol. I have a new Mikuni VM22-133 that I plan to use on it. (not a Mikuni clone). I'm hoping to get some, in the ballpark jetting before start up. All help will be...

On my Azusa I have a pipe and filter and its recommended to jet when I do this, the bike rev up smooth on choke when cold but when warm on run it drives nice but it's a little choppy reving up is this because of my jetting?

The carb is a Mikuni tm24 flat slide. I have made a custom intake manifold to bolt it to my engine. The engine is a harbor freight blue clone with billet internals, ported unschrouded 14cc head with a 27 mm intake valve, and will be right around 13.4/1 CR. The cam is a NR274-0207, CM pushrods...

Ive been reading as much as I can about Predator improvements but still not sure about jetting for my 212 Hemi. Most folks are saying the 140 emulsion tube and a #90 jet works great for the main, and theyre easy to get. What about the idle circuit? Whats the stock orifice and wheres a good...

hey guys ive search everywhere on here but had some questions about jettings i have a 212cc predator with a milled head .050 and board out the carb, mod 2 cam,no gov,18lbs springs and 140 emulsion. currently i have a 36 jet but i havnt fired it yet. do you think i need to go bigger?? i also am...

i finally got my dragbike out and ran it it runs good at 1/2 throttle...but anything over that it bogs and falls on its face..kinda feels like its gonna stall out...thw carb is off a 400cc dirtbike its a mikuni bsr36mm CV carb...i was wondering if i jet it up will it take away that bog seems...

Hey guys, what size main jets and idle jets are you running on your modded Briggs 5hp FH's? Just so I can get an idea on where to start. Thanks. :thumbsup:

I'm trying out VP M5 in my modded predator. I bored out the main into the 60s and it runs well at 1/3 choke (richer?) also conks out at idle (low speed jet needs to be bigger?):shrug:

I hav a 212cc predator with 14cc mill and ported billet long rod billet flywheel 308 cam beefy rocker 26 pound springs 24mm mikini flat slide carb main jet 130 and 15 I just got a 135,140.... 17.5 -20 and 22.5 what combo should I use :confused:

I have a bored and flowed Raptor carb on my built 5hp Briggs and was wondering what stock jet size is? It was running a little rich so I put the jet out of my stock carb in and now seems a little lean. The jet I took outof the raptor carb was a 39 so I need something in the middle. Do I need to...

I have a 24mm mikuni flat slide alky carb that I was using on a mild mod gx200. Looking to also use on my briggs raptor build with a .380 cam, stock stroke, stock size valves, billet parts... Anyone have any experience jetting similar size mikunis for lim mods/small opens?

I have searched for this to no avail. Predator comes lean.. I know this. so some experience surging that may go away with half choke on. I want to get jets to straigten this issue out. I bought a bsp for my Thunderbird. and a 140 emulsion tube kit comes with a 36 main jet and 37 main jet. I'm...

I have searched for this to no avail. Predator comes lean.. I know this. so some experience surging that may go away with half choke on. I want to get jets to straigten this issue out. I bought a bsp for my Thunderbird. and a 140 emulsion tube kit comes with a 36 main jet and 37 main jet. I'm...

So the new predators with the gas vent on the tank and the metal cam gear do not to to be rejetted to a 91 (drill bit #65) IF YOU PLAN TO RUN PREMIUM GAS. If you are running regular gas then 91 is ok maybe a little large. I put a header and air filter on a new predator and drilled the jets...