Honda express compression

Alright guys I know a lot of people have talked about this, but I’m hoping you guys can clear it up. I started my motor ran it till it was hot. The air filter was off, my throttle was wide open. I turned it over 10 times and It only read 35psi. Can it even run with compression that low?? It dies randomly but I can still hit 30mph. Its sometimes hard to start.

Re: Honda express compression

Sounds like you need a new guage .

Re: Honda express compression

Will Harrington /

Bran new

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Re: Honda express compression

No matter . New does not mean functional .

See about using one from an auto parts store . Most decent stores have loan a tool programs .

I doubt any bike would run at 35#s compression .

Re: Honda express compression

Jesse Nordlander /

Put your finger over plug hole and spin it. If you can hold it there without compression shooting past, it's low. If theres a very audible sound of air blowing your finger from seated over hole, it's 100+ psi

The fact that it runs indicates your gauge is trash anyway

Re: Honda express compression

Sounds like you have a crank seal leaking. The snap-on compression guage I used on mine after installing new piston and rings read lower than I expected. Was like 60-65 psi and ran/started flawlessly. Put 2000+ miles on that motor before selling it a year ago.

Re: Honda express compression

Here we go... They are low compression motors.

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Re: Honda express compression

> live ɘvil Wrote:

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

> Here we go... They are low compression motors.

> >

My Simplex is supposed to be able to run on 60 pounds compression , but , it runs a lot better with about 110 pounds compression .

It should be noted that with the higher compression , a better connecting rod should be used , as the OEM rod is a limiting factor .

I would think the same would apply to any motor designed similarly .

Re: Honda express compression

> P D Wrote:

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

> > live ɘvil Wrote:

>

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

>

> > Here we go... They are low compression motors.

>

> > >

>

> My Simplex is supposed to be able to run on 60 pounds compression , but

> , it runs a lot better with about 110 pounds compression .

>

> It should be noted that with the higher compression , a better

> connecting rod should be used , as the OEM rod is a limiting factor .

>

> I would think the same would apply to any motor designed similarly .

Thats nice, if you wanna go all out with modifications. I am referring to stock or o.e.m. parts. Apples to oranges really. How many expresses have you owned again???

And I wouldn't recommend raising compression unless you are prepared to deal with the extra heat created. Stock runs hot enough...

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Re: Honda express compression

> live ɘvil Wrote:

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

> > P D Wrote:

>

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

>

> > > live ɘvil Wrote:

>

> >

>

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

>

> >

>

> > > Here we go... They are low compression motors.

>

> >

>

> > > >

>

> >

>

> > My Simplex is supposed to be able to run on 60 pounds compression ,

> but

>

> > , it runs a lot better with about 110 pounds compression .

>

> >

>

> > It should be noted that with the higher compression , a better

>

> > connecting rod should be used , as the OEM rod is a limiting factor .

>

> >

>

> > I would think the same would apply to any motor designed similarly .

>

> Thats nice, if you wanna go all out with modifications. I am referring

> to stock or o.e.m. parts. Apples to oranges really. How many expresses

> have you owned again???

>

> And I wouldn't recommend raising compression unless you are prepared to

> deal with the extra heat created. Stock runs hot enough...

> >

Agreed . Mods to OEM = apples to oranges .

No matter how many of what I've owned . The same applies .

I simply exemplified what you said^ . ;)

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