HELP ! 4 stroke info needed.

[Simon_A]

Hi everyone, I need some advice. I am thinking about getting a 4 stroker to run on a bike.

The info I need is about the gearbox (gru bee). How do these mount to the engines?

Are the mounting points common with these small 4 strokes?

I ask as I can get hold of a Mitsubishi GT240 engine for a good price, the Honda engines are over $500 here, and I can pick up the said Mitsi for half that.

Its the motor off one of these
http://www.cairnsmowercity.com/prod452.htm

A OHV 2.4Hp 4 stroke.


But its pointless buying one if the gearboxes wont mount up.

Many, many thanks in advance.

 

[wanger]

how many rpm does motor do someting 2 consider
try lawnmower shop in bramalodge frost road? they quoted me $485 approx and maybe cheeper gxh50 witout oil tip sensor
zbox has them have a look under order form full kit $450 4 stroke
or try mbb-imports ebay shop they have bits and pieces

 

[go you good thing]

Local stuff

wanger is spot on.

I have just got my Honda GXH50 from Reynella Mowers for $499.00

Not the cheapest in Adelaide but cheapest in my area down South.

I may have saved $ shopping elseware but due to the cost of petrol lately this was the cheapest.

Monday I got my gru bee kit from MBB-Imports ($295 delivered) and at this stage it looks like it is going to fit well.

This is the easiest way to mount a 4 stroke that I know and I now know it fits.

From my research I don't think the GT240 will fit this kit.

Check this site out for details http://www.honda-engines.com/pro.htm

gygt.

 

[iron_monkey]

I dont think there is nor have I heard of a mounting standard. IMO the mounting points are highly unlikely to be the same.

If the output and rear sprockets didnt need to be aligned, such motors wouldnt need gearboxes (with a big rear sprocket); they run at 3600rpm afaik.

One can mount the motors off centre to align the sprockets (which eliminates the need for a gearbox), but the bike probably wouldn't be able to be pedaled.

 

[Irish John]

Simon, that motor won't fit the Grubee gearbox. Are you talking about a frame-mounted engine? If so you can buy the HuaSheng (Honda copy) for much less than a Honda GXH 50.
This is a good engine and well made etc and fits the Grubee gearbox. The Honda is cheap if you buy it at Small Engine Warehouse in the US - $210. Don't know where you live but they can ship it to Australia for less than Honda costs here. The freight cost from Small eng warehouse are marked up quite a bit above the real cost but I save about $100 per engine. I've started buying local Hondas though cos I want to support local business where possible.