Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

I have a stock MB5 with 700 miles and relatively stock except Mikuni VM20, and have oil injection adjusted according to manual. Also is there a adapter to plug the VM20 into the stock air box? Thanks!

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

If you don't want oil dripping out of the exhaust get a 4 stroke. There is no adapter for the VM20

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Pushrod Fifty /

It's over carbureted because you put a VM20 on it. A VM20 is about right for a 125cc. The gas that you are spewing out evaporated, leaving only the oil.

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Dirty30 Dillon /

Combination of poor tuning and over-oiling.

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Oh yeah wait what why would you put a vm20 on a stock setup?

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Jack Rutherford /

I think these forums generally recommend a vm20 as preferred preformance upgrade on stock mb5. Now's the time to say otherwise. (edited)

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

> Jack Rutherford Wrote:

> -------------------------------------------------------

> I think these forums generally recommend a vm20 as preferred preformance

> upgrade on stock mb5. Now's the time to say otherwise.

I guess I've never had a fully stock MB5. Generally speaking carb is one of the last things you upgrade, after pipe and cylinder. What came stock, a VM16?

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

I run a VM20 on my stock cylinder with a mlm pipe. I think I have a 165 main jet in there and a 17.5-22.5 idle? With a screen air filter. If you’re using the stock pipe then adjust your jetting a little down.

The VM20 works fine but to be honest the stock carb works fine as long as you have the stock cylinder. Just more future proof for if you throw a kit on it. A little more responsive but its louder too.

You have to get a new intake pretty sure and while you can stretch the boot to fit the carb somewhat, I just ended up deleting the air box. Have to rig up something to mount one of the side covers though. Oil injection still working greats with the MLM intake

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Jack Rutherford /

> Nick MBC Wrote:

> -------------------------------------------------------

> > Jack Rutherford Wrote:

>

> > -------------------------------------------------------

>

> > I think these forums generally recommend a vm20 as preferred

> preformance

>

> > upgrade on stock mb5. Now's the time to say otherwise.

>

> I guess I've never had a fully stock MB5. Generally speaking carb is one

> of the last things you upgrade, after pipe and cylinder. What came

> stock, a VM16?

Judging by the Honda part number alone, I'll go with vm16

161A0-166-044

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Jack Rutherford /

Yeah, I think there was some other recommendation for performance as well along with the carb, but a bigger carb alone on a stock setup would probably only hurt your low end unless Honda threw in a bottleneck with the vm16.

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Stock carb is a 16 keihin

Re: Honda MB5 Oil Dripping from end of Exhaust Pipe when i stop.

Jack Rutherford /

> Jacob Fulton Wrote:

> -------------------------------------------------------

> Stock carb is a 16 keihin

Alrighty then.

I dug this up in the forums from ages ago on mb5 recommendations:

"My recommendation for the ultimate "rideable" MB5 is a 20mm carb, hi-flow filter, CR80 6-speed tranny (nice, but not necessary) and a regear. Done deal. Everything else is just big bucks for minor gains.

Also, I've done some calculations and experiments and I woudn't recommend going bigger than a VM22 on a kitted MB5. The increased flow at WO is offset my poor signalling (and thus throttle response and power) at mid-throttle. Bigger doens't always mean better."

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