what mod should I do next? black mamba build

[OND]

Thanks, and I don't have a tach on it....but like I said it gets scary sometimes.. It just keeps winding !

 

[Latent]

Thanks, and I don't have a tach on it....but like I said it gets scary sometimes.. It just keeps winding !

I'm installing my tach tomorrow but I doubt I'll ever turn it over 7000 rpm to be honest. 7000 rpm will my gear ratio would be like 60+mph lol.

 

[OND]

Agreed 7000 rpm's and stuff will live ....no way in hell I'm going 60 on a mini bike ! :anon.sml:

 

[Fantic Freddy]

That's comforting, I don't want to see you get hurt.

 

[Latent]

Got the bike together and took some pictures today. Still got some fine tuning left to do, but overall it is 99% done. Definitely going with a 24mm flat slide so I can get rid of the stock throttle control, have a cleaner looking set up and have more control over tuning.

<img src="https://picoolio.net/images/2017/04/13/IMG_0264bcd92.jpg" alt="IMG_0264bcd92.jpg" border="0">
<img src="https://picoolio.net/images/2017/04/13/IMG_02651dff7.jpg" alt="IMG_02651dff7.jpg" border="0">
<img src="https://picoolio.net/images/2017/04/13/IMG_02663b865.jpg" alt="IMG_02663b865.jpg" border="0">
<img src="https://picoolio.net/images/2017/04/13/IMG_0267749d5.jpg" alt="IMG_0267749d5.jpg" border="0">

 

[Latent]

 

[Latent]

ffs my free image hosting site is down had to use this forums image uploading link and failed.. I'll edit these links later

 

[David wulf]

Athe bike looks good , the pictures suck . Lol

 

[Latent]

Athe bike looks good , the pictures suck . Lol

lmfao made my mediocre bike look even worse :laugh:

 

[dragracertpp]

Still have the bike and the same engine, engine has great power and unbelievable RPM's ...It scares me sometime ! :scared:It just keeps winding ... but I like .:biggrin:

Love the bike, gorgeous. Really like the color and all the chrome


Sent from my iPhone using OldMiniBikes mobile app powered by Tapatalk

 

[Latent]

would you guys recommend running a mikuni 24mm flat slide carb with a fuel pump? I'm thinking it might be better to run it without the fuel pump? Anyone got any recommendations? I have a fuel pump on hand and it can be easily set up, but fuel pumps have given me trouble in the past. So should i run a mikuni with a manifold with a pulse fitting and with a fuel pump or should i run it without both? Thanks.

 

[Latent]

Well no coil bind but we were running 37 lb springs . As far as jetting we were at a 140 main and 20 piolet .

where did you get the valve strings and retainers? they got 36lb springs on arc with valve retainer keeper kit for them... i might try the 1.3 rockers with a 24mm mikuni flat slide just trying to decide whether to run a fuel pump or not... did you? thank you.

 

[David wulf]

One thing I've heard is Mikuni's don't like pumps , to much pressure. I would get it mounted first and see how it sits in relationship to the tank outlet . If it's the tank outlet is level or even a little lower I would try it without a pump . The fuel will run out that tank up hill for and 1" or so to that carb .

 

[Latent]

One thing I've heard is Mikuni's don't like pumps , to much pressure. I would get it mounted first and see how it sits in relationship to the tank outlet . If it's the tank outlet is level or even a little lower I would try it without a pump . The fuel will run out that tank up hill for and 1" or so to that carb .

Thank you. The thing is my rtc-6 head has 5mm stems instead of the usual 5.5mm stem valves. Would these valves work with the 36 lb springs arc racing provides DJ-1057 36lb Valve Spring (Sold Individually) - ARC Racing while using their retainer and guides for these springs DJ-1046 Valve Retainer Kit w / keeper for 36lb Spring - ARC Racing ? Or which springs and retainers did you use for your rtc-6 head because they are equipped with 5mm stem valves not 5.5mm stem valves.. Thank you. :smile:

 

[trinik7597]

Use a reamer and open up the valve guides ... Order the 5.5mm valve and Spring package .. stock valves will not use retainers and locks for stainless valves ..

 

[trinik7597]

This is just my opinion ... Increasing the lift to .357 by using 1.3's is counter productive with out major port work ... Ratio rockers do not only increase lift they speed up the ramp considerably .. when you plan on doing this on a build it all starts with the head .. then the cam .. they increase the lift but not the duration so a cam with added duration and a head that has flow numbers somewhere close to 100cfm are almost a necessity . Also I would suggest dual springs with the increased ramp speed to hold the lifter on the lobe better .. an engine is a package deal.. just adding parts for the sake of adding parts doesn't mean you will see any significant gains .

 

[Latent]

This is just my opinion ... Increasing the lift to .357 by using 1.3's is counter productive with out major port work ... Ratio rockers do not only increase lift they speed up the ramp considerably .. when you plan on doing this on a build it all starts with the head .. then the cam .. they increase the lift but not the duration so a cam with added duration and a head that has flow numbers somewhere close to 100cfm are almost a necessity . Also I would suggest dual springs with the increased ramp speed to hold the lifter on the lobe better .. an engine is a package deal.. just adding parts for the sake of adding parts doesn't mean you will see any significant gains .

Yes this makes sense, and If I would to add the 1.3 rockers with the 24mm mikuni flat slide I would mill down the head approx .05"-.065" at my buddys shop, and do some port/polish work on the exhaust and intake valves, not sure about reaming out the valve guides and installing 5.5mm stems not sure if my limited mechanically skills could do that properly, lol. There must be retainers that work with the 5mm stems and 36-37lb valve springs though?