larry s. k. Posted December 21, 2019 Report Share Posted December 21, 2019 Hi Purchased a Sherpa m80 100 cc , on ebay few years ago ,just engine , Installed new piston please look at pictures ,small head ,don’t see any 100cc , on m80 ,, what you think Quote Link to comment Share on other sites More sharing options...
larry s. k. Posted December 21, 2019 Author Report Share Posted December 21, 2019 (edited) Bul model 92 pictures of engine in progress I mk at 83.00 the bottom of sleeve look thin . So will check on other options. Or maby as is with new piston rings Edited December 29, 2019 by larry s. k. Add Quote Link to comment Share on other sites More sharing options...
model80 Posted December 21, 2019 Report Share Posted December 21, 2019 OK, I’m completely confused by this post. Have you got 1 engine or 2? What exactly do you want to do? Quote Link to comment Share on other sites More sharing options...
larry s. k. Posted December 22, 2019 Author Report Share Posted December 22, 2019 Hi ya have 2 listed I was looking for another 100cc model 80 and found one , so bultaco model 92 350 was wondering how big can I bore or replace cylinder with another that will fit it’s at stock bore with original cylinder , by the book stock is 83.2 can I install say 360 cylinder , or any info just looking to trick more hp , Quote Link to comment Share on other sites More sharing options...
feetupfun Posted December 22, 2019 Report Share Posted December 22, 2019 1 hour ago, larry s. k. said: Hi ya have 2 listed I was looking for another 100cc model 80 and found one , so bultaco model 92 350 was wondering how big can I bore or replace cylinder with another that will fit it’s at stock bore with original cylinder , by the book stock is 83.2 can I install say 360 cylinder , or any info just looking to trick more hp , More HP? Have you ridden it yet? They are known for a few things but not for lacking power 2 Quote Link to comment Share on other sites More sharing options...
larry s. k. Posted December 22, 2019 Author Report Share Posted December 22, 2019 Hi have not fired up this engine have some parts to complete , as a short block found a match cyl , would like find better cyl..yes would like make more hp , has good crank rod is ok , I had a model 213 running few years ago , it sat years old gas in tank , got it running after few hours cleaning it was not very powerful lasted 3 hours and lower end &. Piston started scoring , and puffing out of carb , so I put this on back burner , would like to make fast 326 , if possible ,pursang parts big bore best ignition. , maby with some ideas ,, Quote Link to comment Share on other sites More sharing options...
suzuki250 Posted December 22, 2019 Report Share Posted December 22, 2019 Why would you want a fast trials bike? Quote Link to comment Share on other sites More sharing options...
feetupfun Posted December 22, 2019 Report Share Posted December 22, 2019 4 hours ago, larry s. k. said: Hi have not fired up this engine have some parts to complete , as a short block found a match cyl , would like find better cyl..yes would like make more hp , has good crank rod is ok , I had a model 213 running few years ago , it sat years old gas in tank , got it running after few hours cleaning it was not very powerful lasted 3 hours and lower end &. Piston started scoring , and puffing out of carb , so I put this on back burner , would like to make fast 326 , if possible ,pursang parts big bore best ignition. , maby with some ideas ,, The open class Pursang cylinder that fits that bottom end is also 325cc. The later open class Pursangs (360 and 370) have a longer stroke, as does your model 213 Alpina Quote Link to comment Share on other sites More sharing options...
larry s. k. Posted December 22, 2019 Author Report Share Posted December 22, 2019 7 hours ago, suzuki250 said: Why would you want a fast trials bike? Hills climb , race other bikes open dirt road ,around hear there old Loggin roads where I started , with old Honda sl 90 with a straight pipe nice and loude , ,',,,,,,,,,, ,I have a steep hill near home going to tackle it ,,, I Quote Link to comment Share on other sites More sharing options...
rcgods Posted December 24, 2019 Report Share Posted December 24, 2019 On 12/22/2019 at 4:43 PM, larry s. k. said: Hills climb , race other bikes open dirt road ,around hear there old Loggin roads where I started , with old Honda sl 90 with a straight pipe nice and loude , ,',,,,,,,,,, ,I have a steep hill near home going to tackle it ,,, I Sounds like you need a motorcross / enduro bike rather than a trials bike for this particular task. Ignore for a minute finding the cylinder to fit, the gearing of the engine will be all wrong and there is only so much you can do with sprocket swaps. Quote Link to comment Share on other sites More sharing options...
larry s. k. Posted December 25, 2019 Author Report Share Posted December 25, 2019 (edited) Do you dig it ,,,, message 12 30 2019 , please I. seem to say something a little off , please don’t take it personal Just from states , thanks ,, Edited December 31, 2019 by larry s. k. Add Quote Link to comment Share on other sites More sharing options...
model80 Posted December 27, 2019 Report Share Posted December 27, 2019 On 12/25/2019 at 2:34 AM, larry s. k. said: Do you dig it Not really. It sound to me like you need a Frontera, or a Pursang. Quote Link to comment Share on other sites More sharing options...
bult360 Posted December 29, 2019 Report Share Posted December 29, 2019 On 12/28/2019 at 12:55 AM, larry s. k. said: Hi dublin Ireland , cool , I have variety of bikes ,yes like pursang frontera , I have collection , projects in different states of repair , like my own little work shop , I pick up engines ebay , frame wheels , exc. purchase local Craigslist projects , when , price is right ,, Noticed you like Sherpa , there very popular in Europe , pursang is most popular in states , I have model 68 runner not with original 68 cylinder it’s a putter , think cyl off Alpina 85 , it was a fixer , I purchased Craiglist 4 years ago , 550, usd , had to drive 200 miles , purchased another gas tank original side covers rear wheel new clutch , seat cover , ignition and front fender pointy one , , have happy new year I I Hi , the equivalent year pursang (model 104 ) parts will fit straight on but the cases will need matching as the transfers are bigger on the pursang . you wont get 352cc mk7 or 363 cc mk8 pursang parts to fit as they have different stud centres plus they have longer stroke , not forgetting the airbox and exhaust , ignition and primary weights . Its a Sherpa T a trials bike , theres a reason Bultaco made the frontera and pursing , enjoy it for what it is . Quote Link to comment Share on other sites More sharing options...
larry s. k. Posted December 30, 2019 Author Report Share Posted December 30, 2019 Quote Link to comment Share on other sites More sharing options...
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