Manky Monkey Motors

Know the predilection on here for this model, just thought I ought to bring it to your attention.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=170604882877&ssPageName=ADME:B:SS:GB:1123

Now I`ve had a couple of these years ago and never heard of the 750 conversion, but it was that long ago they may not have existed then.

The good old XS................  ;)

The 750  conversion on this bike is from 'Mikes XS', a USA company, and its made up of either: replacement barrels with suitable pistons etc. OR separate liners (to be fitted into your existing barrels) and pistons.

http://www.mikesxs.net/products-25.html#products

Europe dealership is
http://www.xs650.biz/p/36/1423/mo74-cg%7C22=5/pistons-rings-pins-%26amp%3B-clips-cylinders


The other 750 conversion that used to be easily available was from Wiseco, they supplied replacement liners (which, again, you had to have fitted to your stock barrels) along with pistons.

Had an 840 halco engine in a little chop a while back,wish I still had it,anyone know where to get bits to build another?

As far as I know, Tony "Halco" is no longer with us.

These guys (The Probike Centre, Wolverhampton, West Midlands, 01902 401335)
 have an engine for sale on eBay which should interest you........

http://cgi.ebay.co.uk/Yamaha-XS650-XS-650-Engine-840cc-Conversion-Halco-/200575179286?pt=UK_Motorcycle_Parts&hash=item2eb3365a16

They (The Probike Centre) say:
Due to a cancelled order, redunancy we were told, this is a rare opportunity to purchase this XS650 engine which has been proffessionally converted to 840cc by ourselves (XS enthuiasts) to "Halco Tuning" (the lateTony Halls specifications).

The engine has been entirely stripped (a must for this type of conversion) it has had the top engine case machined out to accomodate the new larger liners and barrels, it has new pistons, new timing chain and tensioners both pivoting and solid, new camshaft bearings, new sump gauze filter, new crank seals pushrod seal, cam seals, plus all new gaskets throughout. it has a new 7 plate clutch conversion and heavy duty springs ( a must for handling the extra power and torque. It also comes with generator stator and rotor, carb manifold rubbers, kick start, the cylinder head has been stripped mildly ported and polished, the valves and seats re-cut and lapped in - see pics.

The engine cases have been vapor blasted and eched then painted with proffessional satin black case paint, same with head and barrels which then had the edges of the fins milled. the clutch and generator covers and tappet windows have have been proffessionally polished and an original Halco Tuning generator cover fitted.

All you need are carbs, and an ignition system and oil, we would advise a Boyer Bransden system they work very well with this conversion, we can supply and install at an extra cost, or we can fit a points system for no additional costs.

This conversion costs over £850.... for machining and piston costs alone!


SOLD for £1850

If you're just interested in building one yourself and it being 800+cc, then its back to Heiden (Europe's "Mikes XS" dealership) as they do an 880 kit off the shelf, but the donor bike has to be the right type (447 or 533, differnet con rod lengths I think??).
It also mean opening up the crankcase mouths.

http://www.xs650.biz/p/28/1423/home

Cheers Tony  ;)

your right halco tony passed away about 7yrs ago had the pleasure of dealing with him on numerous occasions r.i.p tony