px 125 upgrade

[karlpip]

i need a bit more zip out of my px 125.which is the best way to go.a166 barrel a 180 with a better pipe or a 200 or t5 engine.what speeds could i expect out of them,as i want to do some touring .

[dto79px]

if you have a full licence then a standard px200 would be the best one

[bryno]

Standard 200 would be my choice as well, T5 is IMO a bit revvy for touring and lacks torque, not so good when you hit a hill or carry a passenger ..

[karlpip]

ive been trying to find out a bit more about the pinasco,olympia 180 kits,with a sito plus exhaust or similar.i could do these myself.but i dont fancy having a bash at porting.

[dto79px]

I have a olympia 180 kit and sito plus exhaust on my px , 180 kit fits straight on and requires no porting ,pulls away better and alot better uphills now top speed is the same but will stay at it

[t]

It all depends how far you want to go with tuning and how much cash you have!
For touring a stock or mildly tuned P2 is probably your best bet.
If you want to tune the 125 lump then a DR180 is pretty good for touring around. It isn't suited to high revs as it has thick rings but the increase in ccs adds a bit more oomph. It's designed to just bolt on without opening up the casings but can be tuned further if req'd. I've got some pics up at photobucket s21.photobucket.com/albums/b270/t5trash/DR180/, I've roughly opened up one port to show how much can be taken away. I ran a DR180 with a 24mm T5 carb and sito plus for years without problems. You are only looking at a cruising speed of 55-60mph with stock gearing. I up geared mine for motorway work.
A malossi 166 kit is another option. This is more powerful and better suited to high revs. For a high power motor it is the better option and has a much better piston. The casings need opening out (not a hard job) to get the best from it. It makes power higher up the rev range though so may not be as suited to touring. I ran one of these as well and it was harder work to ride as it was in a higher state of tune (i had a 30mm carb, probably too big but it looked good!)
There are also the polini and pinasco kits although I haven't used these. The pinasco is alloy so should get rid of the heat better and the polini has had good reports.
If you need any more details let me know.

[karlpip]

thanks for all your help .olympia and sito look the easiest option.the pinasco would have been first choice but i dont really fancy chopping bits of metal off my engine.theres a fine line between tuned and botched.

[dto79px]

if you fit the 180 kit and sito exhaust and use the standard 20mm carb then a 115 main jet works the best on mine