bigger carbs = more rpms

[addicted]

I've been at this for a while on my ski trying to properly jet gp1200 carbs on my raider.

I got a chance to throw my PET2100 on a stock raider over the weekend. It was spinning 6500+/-

I was testing a stock prop on my ski witch is almost perfectly jetted(just need to lower popoff, I think) and it was turning 6800+

So there you have it, roughly 300 rpm's when you throw 44's off a gp1200 onto a raider 1100.

[cfgp927]

the only thing you need now is a larger fuel tank.....along with the increase in rpms you'll see an increase in fuel consumption....also a whole lot more smiling.
mike

[Darthraider]

TJ, says that 48s are 7 hp better than 46s on a ported 1200.

[Duke]

I have always experienced good results with the larger carbs. Even put 48s on a stock 1200 and picked up everywhere.

[dav_dman]

the 1100 fuel supply line is smaller diam.

I hooked up to both reserve and the "on" line and tee'd into the carb fuel lines between the carbs..also ran a restrictor jet.

[addicted]

What I did was run a gp1200 selector switch. It is .5mm larger ID than a 1100 selector. Stock routing, filter, ect. Actually have too much gas. Running. . . 110pilots and 100 mains. VF3's, stock bore, comp, ect. 1200 cdi.

[Flying Scotsman]

addicted

stock 44 carbs or Buckshot 44 carbs
Plus your reeds would account for some rpm over stock.

[addicted]

stock 65u carbs. vf3's i'm sure are helping. I've rejetted alot, and each time gain rpm's. once I am happy with the jetting i will try to do a back to back on the stock vs vf3's. I am curious. . . I can tell you that they are screwing with my jetting, and that the midrange hit is unvelieveable!!!

[CatRunner]

Great info here....>> I`m following along, as I am planning a carb upgrade......

[addicted]

UPdate:

After playing with popoff and needles, rpm's are up to 6950 on a stock prop 61.5mph before it started bouncing uncontrollably. I have some shimming to do. . .