Geoclinton Posted September 8, 2011 Share Posted September 8, 2011 Hi Can anyone advise me on swapping a 175mx head down to a 125 head? How much power loss, is it difficult? and will it struggle on a 175 body? Cheers Geo Link to comment Share on other sites More sharing options...
blackhat250 Posted September 8, 2011 Share Posted September 8, 2011 Well " the stud holes should line up , but the Squish area is much smaller, whitch will up the compression ratio, ,, so in theory should be more power, or a stressed bottom end,,,? trial & error ,,, Link to comment Share on other sites More sharing options...
Geoclinton Posted September 13, 2011 Author Share Posted September 13, 2011 OK cool I think I will save that for last. Cheers Geo Link to comment Share on other sites More sharing options...
Moderator Cynic Posted September 13, 2011 Moderator Share Posted September 13, 2011 Not possible, 125 has 4 studs/holes 175 has 6. If you mean the whole barrel, piston etc then apart from a re jet all will be good (and a tweak to the oil pump), not much of a power difference (in my experience) but you will have to really rev the bastard to get the best of it as a 125. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 13, 2011 Moderator Share Posted September 13, 2011 Not a hard job to convert Geoff Link to comment Share on other sites More sharing options...
Geoclinton Posted September 15, 2011 Author Share Posted September 15, 2011 Sounds pretty good to me.chaps. After its on the road I will go ahead with this if I can find someone local .I like the overall chunkier look to the bike. Am I right on thinking the 125's are slightly smaller? Cheers Geo Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 15, 2011 Moderator Share Posted September 15, 2011 Sounds pretty good to me.chaps. After its on the road I will go ahead with this if I can find someone local .I like the overall chunkier look to the bike. Am I right on thinking the 125's are slightly smaller? Cheers Geo no they are exactly the same size bike Link to comment Share on other sites More sharing options...
Geoclinton Posted September 15, 2011 Author Share Posted September 15, 2011 Tyres perhaps? Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 15, 2011 Moderator Share Posted September 15, 2011 Tyres perhaps? tyres perhaps what? Link to comment Share on other sites More sharing options...
Geoclinton Posted September 15, 2011 Author Share Posted September 15, 2011 A wee bit bigger Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 15, 2011 Moderator Share Posted September 15, 2011 nope the bikes are the same in all but displacement Link to comment Share on other sites More sharing options...
Geoclinton Posted September 15, 2011 Author Share Posted September 15, 2011 I got confused by photos of 2 together but with the 175 slightly higher at the back and front looks like its been jacked up making it appear a lot chunkier Thanks Geo Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 15, 2011 Moderator Share Posted September 15, 2011 some people jack them up, 125's can be jacked too if that's what 'floats your boat' yours looks jacked to me by the avatar pic Link to comment Share on other sites More sharing options...
Geoclinton Posted September 15, 2011 Author Share Posted September 15, 2011 I am 6"2 and heavy so its working for me. Thanks for the insight Geo Link to comment Share on other sites More sharing options...
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