125-200cc husky 125 sm porting,worth it ?

Is it worth me getting my husky sm 125 porter ?

I'm just getting a replate as we speak, and have been offered to get cylinder head,cylinder and pv to have work done to them, going to cost me £150, is it worth the money, will it bring my bike on par with husky cr ?? As I know the sm cylinder is slightly diffrent I'm told.

Sm cylinder is retard by 2mm. Porting alone will not help, you need to skim the top of the barrel and regroove the oring seat.

par with a CR needs another carb, reeds, exhaust, ignition.

replating is in progress so more or less to late to send it of to walt to make it a 165

yet you would also need the above listed items

That is worth doing it

in your position replate it and leave it stock till you have the commitment to all the above changes and go for a 165

that would makes it a truly a fun bike

Robert-Jan

I think nobody ever tried to run a 165 WRE Cylinder... the problem is the transfer ports will be even lower when the big bore job is done...
I m planning to do this conversion though.
But not sure when as i m busy with my own 165cc conversion based on a CR barrel.
Best would be to get the bigger carb and cr/wr exhaust first.
But it would be intresting to see what porting will do to a WRE cylinder.
If you are going the porting route please let us know the difference.

Have all the items at hand its the time I am missing here to put it together (a bit the down side in being successfull what i am doing)

but the cylinder is also based on a CR one

Robert-Jan

Which cylinder you are talking about?

the cylinder I have in my hand but still have to end up on my SMS

Is that a wre/sms or a cr/wr cylinder?

CR cylinder

Okay, should be a great performance improvement then.

I like to clean up the ports and polish the exhaust port. But don't over do it on a 125. I did a cr125 older Honda and I ended up with all the power band being narrow mostly at the top end. It was like a light switch we just hung on to it when it hit.
It wasn't for a beginner. The bike ate 250's.

In response to the initial question. No, it's probably not worth porting. Not unless they can raise the ports be 2 or 3mm (might be a bit difficult running into water jackets etc.) The best way to get a performance increase out of the WRE (aside from swapping the cylinder for a CR or WR unit) is to get a base spacer machined up to lift the cylinder to correct to retarded port timing! This will be a more cost effective used of your money. You will need to get you head skimmed & machined to correct your adjusted squish & compression ratio!
If anyone know's better please feel free to correct me on this one!

Hope this helps