MB100 development

[flyingbrick]

So good. Just needs a little more power.

[flyingbrick]

Hi everyone! Hope you are all enjoying summer so far :-D.

I managed to purchase numerous parts and a workshop manual for this thing and still racking up kms wherever possible.

A few questions-

Every time i ride it my clutch feels like the plates are initially stuck together and then afterwards the clutch seems to slip.

Before i strip it down to inspect and measure plates and basket- are there any recommended suppliers of new parts?

Also, do bar end weights do what they promise and reduce vibrations? Im tired of having (what i like to call) weed eater hands. Lol.

Best oil for gearbox?

Cheers :-D

[husaberg]

Hi everyone! Hope you are all enjoying summer so far :-D.

I managed to purchase numerous parts and a workshop manual for this thing and still racking up kms wherever possible.

A few questions-

Every time i ride it my clutch feels like the plates are initially stuck together and then afterwards the clutch seems to slip.

Before i strip it down to inspect and measure plates and basket- are there any recommended suppliers of new parts?

Also, do bar end weights do what they promise and reduce vibrations? Im tired of having (what i like to call) weed eater hands. Lol.

Best oil for gearbox?

Cheers :-D

Sticking plates is a common Honda malady
Kick it over with the clutch pulled.That will generally free it.
I used to use Mobil 1 but its likely different now with fiction modifiers etc not suited to bike clutches
Honda used to recommend Castrol GP.
The Honda MB100 clutch plates are the same on pretty much all small Hondas just the number of plates varies.
If its slipping on a std MB you might not have enough free-board on the clutch or the plates are just worn.
If it vibrates your mounts are likely loose or slogged our wider. or its not shimmed correctly.
N ewer grips that are more rubbery might help.weights can help with tingling vibes as its a resonance thing so could changing the bar design or shape.
If you do the clutch check on the timing of the balance shaft at the same time just to be sure..
Clutch plates on the CR80-85 fit and are supposed to be better material but any accessory part shop will have plates anyway.
The springs tend to sag with age as well. EBC used to do stronger springs i never used them.

[F5 Dave]

You can file down the pillars to preload the springs a little. Or add another plate but requires machining and not really required until over 20hp.

[flyingbrick]

Thanks you two.

Just ordered a pair of new shocks for the back as these are shagged- next mission is re-wiring the thing to full wave 12v.

Also bought a spare rear swing arm to lengthen a couple of inches (purely for looks, nothing too crazy) and husaberg steered me into a great deal on some carbs.

@husaberg have you managed to find any forks yet? I found a 6 speed box for $300 but probably couldnt get that much past the wife at the moment.

[husaberg]

Thanks you two.

Just ordered a pair of new shocks for the back as these are shagged- next mission is re-wiring the thing to full wave 12v.

Also bought a spare rear swing arm to lengthen a couple of inches (purely for looks, nothing too crazy) and husaberg steered me into a great deal on some carbs.

@husaberg have you managed to find any forks yet? I found a 6 speed box for $300 but probably couldnt get that much past the wife at the moment.

300 seems fair enough,but if are in the right place you can get complete bikes for that with spares its the luck of the draw,
Have you have you tried Ebay for a 1980-1982 Cr80 (Red engine gearbox)
they are better ratios than the MB5.

[Autech]

Thanks you two.

Just ordered a pair of new shocks for the back as these are shagged- next mission is re-wiring the thing to full wave 12v.

Also bought a spare rear swing arm to lengthen a couple of inches (purely for looks, nothing too crazy) and husaberg steered me into a great deal on some carbs.

@husaberg have you managed to find any forks yet? I found a 6 speed box for $300 but probably couldnt get that much past the wife at the moment.

Guy that bought some fairings off me today mentioned he has a MB100. Want me to ask him if he has any spares lying around he could on sell?

Sent from my SM-A730F using Tapatalk

[flyingbrick]

Dont really need anything but ask him anyway thanks mate!

I tightened my head bolts.. they were so loose that after turning off the bike you could see oily air bubbling out from between the head and cylinder and cylinder and case!

Still bubbles from cylinder and head (will need new gasket) but shes gained over 10kph!!! Top speed on open road now 120ish

[F5 Dave]

Came across one of these . This might perk it up.

[TZ350]

Came across one of these . This might perk it up.

It would perk me up..... yes sir.

[husaberg]

A bit more realistic
even with the gearbox speed up its going to be a weak link

[F5 Dave]

Check out the honey container in the background.

[TZ350]

.
Taranaki ......

[flyingbrick]

One day i might go through these pages and compile an actual manual on mb performance.. getting sick of going backward and forward through this and ese threads searching lol.

Will making my head seal with no gasket make a noticable increase in compression?

Do people space up mb cylinders to raise the ports? (And machine top of cylinder)


Just easy to complete tasks that I've read about online

[F5 Dave]

Just throwing away the gasket and using some Loctite naster gasket will seal just fine. That will reduce the squish and increase the compression ratio. But you really must measure both to be sure you don't go too close or too high.

From this point you will need to consider a crank rebuild as more revs are more stress will call time on old parts.