[Manny Dial]

Thanks Gary! Between cleaning the Carb and rerouting the vent lines, the kart drives great now with no bogs! Appreciate everyone’s advice. Now I can setup the kart to idle as well! One quick follow up question: is it recommended to empty the bowl after racing? I don’t plan to take it out again for a week and wasn’t sure if my gas mix will possibly clog the ports again (20:1 redline 110oct). I’m thinking it originally got clogged due to the old 927 mix just sitting in the carb for a few months from the previous owner.

Thanks

Manny

[Manny Dial]

Ah thanks William.  Here’s some progress info & pics.

Main Jet: 180

Pilot Jet: 30 (?? Impossible for me to read and thats a guess with the jet pointing down)

Visual Plug: Dark Brown/Black (Rich)

Cleaned the heck out of the carb.  I can see better through the Pilot, and the float seems to move freely.  The needle tab seems ok as well.  I notice that it seems like the Pilot is too fat / rich?  I start the kart and rev it to keep the idle up for about 5 mins, then let it choke itself out.  I can’t restart it without a few wheel pulls and the throttle has to be about 15% down.  I also notice fuel is coming out of the drain nipple at the bottom of the carb while I’m having difficulty starting.  Once it fires up it sounds good though.  I plan on taking the Kart out this week to see if cleaning it helped any.  I’m really hoping it was just a sticky float on high G corners.  What would you guys recommend for a Pilot at this point?  With a black plug sounds like I might have some room to lean.

I took your advice and cut/routed the loop line.  This is how i’ve seen it on 125 shifters

[img]http://i640.photobucket.com/albums/uu122/my3awds/A_zps4f085831.jpg[/img]

Bottom all cleaned out

[img]http://i640.photobucket.com/albums/uu122/my3awds/B_zpsca8037df.jpg[/img]

Float looks to be parallel

[img]http://i640.photobucket.com/albums/uu122/my3awds/C_zps2b9e4de7.jpg[/img]

The bowl was about this clean before washing it out

[img]http://i640.photobucket.com/albums/uu122/my3awds/D_zps1b7017eb.jpg[/img]

Jets cleared out

[img]http://i640.photobucket.com/albums/uu122/my3awds/E_zps0a4debe0.jpg[/img]

 

[Manny Dial]

Thanks for the reply.  K&N style filter with a Flat Slide type Mikuni Carb.  I went out to Prairie City today which is a tighter course and it was VERY apparent around all lefts.  I’ll post vid on it soon.  I just got done taking apart the carb. Pics below of the setup.  Can anyone help verify the lines and if this is truly a pump around setup?  The pilot jet looks semi clogged as the light passing through the main hole is barely a hair size.  Can’t tell the size but I’ll double check to see if anything is written on it.  Any other tips are appreciated.

This pic shows the carb.  It looks like the fuel pump line goes up into this cylinder regulator (?) then down into the carb.  The cylinder also has a nipple facing outward that goes to the bottom of the tank.

[img]http://i640.photobucket.com/albums/uu122/my3awds/8DB8D4FC-866C-4330-8587-AC6F8F061B6E-1834-0000029F083F0278_zps2f2d61bb.jpg[/img]

Picture of the nipple going to the bottom of the tank

[img]http://i640.photobucket.com/albums/uu122/my3awds/B7822511-16DC-46F4-894C-69A996DFAB0E-1834-0000029F2A710CB4_zpsb8037936.jpg[/img]

Fuel tank.  Didn’t notice any vent line?

[img]http://i640.photobucket.com/albums/uu122/my3awds/23058050-2B54-43FB-8CA0-925D08E5C19F-1834-0000029F75111788_zpse7f32d05.jpg[/img]

The carb has a vacuum line that loops back to the other side of the carb?  Bottom line just vents to the ground.

[img]http://i640.photobucket.com/albums/uu122/my3awds/CF5AAD5B-4616-41CD-9EFC-26089FA4906B-1834-0000029F41890B53_zps4f9aa214.jpg[/img]

[Manny Dial]

Decided to start a new thread in the proper section (sorry about that) since it’s a different issue.

 

https://new.ekartingnews.com/forums/topic/cr80-shifter-bogs-out-of-hard-lefts/

 

[Manny Dial]

Thanks for the responses.  It currently has Maxima 927 mixed, so I will do the 24:1 suggestion next and keep the B10 and 100 oct.  It could very well be me being timid, not riding it hard enough.    I’m not use to hearing the rpms run up so high since I’m only accustom to car track racing (sub 8000rpms).   I’ll downshift thinking my rpms are high enough, apex, throttle out but it’ll feel flat and no response at all from the throttle for a few seconds before pulling hard.  So maybe on my next session I will really try winding it up and keeping it up there to see if I notice any change.  I’m thinking this might be the case since I notice no breakup at all when it pulls or while cruising around corners.  Will post again when I find out more.

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