Needle size hif44

[Piston broke]

Hi
I'm just about to set up a 1275 midget engine, but need to know the correct size needle to run in an hif44 1 3/4 inch carb?

Correct information welcome!

I will be running k and n metro air filter.

Would I need different needle if engine was fast road one??

Thanks

PB

[bmcecosse]

No one can tell you exactly - but try the BDL for a starting point and then work from there with plug colour checks - and ideally a 12 volt exhaust gas analyser so you can check on the cruise/charging up hill/flat out in top.....

[Piston broke]

Lovely. Thanks AGAIN bmcecosse! I should have just PM'd you.

[bmcecosse]

NO! Always ask on here -others may well have better suggestions. The BDL is just the 'standard' starting point - it won't be perfect - every engine set-up is different.

[Piston broke]

It's a Marina lump. Standard not tweaked. Not a Midget lump as formerly mentioned....!!

[Piston broke]

You're gonna tell me a 1.5 cm diameter exhaust with 3 branch LCB ain't big enough next??!

[bmcecosse]

I agree - 1.5 cm is smaller than standard - a pea-shooter in fact! You need a 1.75 INCH to get the best from a 1275 engine. However 1.5 INCH will be ok on a standardish Marina engine.......

[Piston broke]

Hum.... So, does anyone sell exhaust system 1.75????

[IslipMinor]

Yes, Maniflow do a complete 1.75" system, or the LCB and rest of the exhaust separately.