KKtrips Posted December 29, 2010 Share Posted December 29, 2010 Agree to seat looking strange (looks like an exercycle seat) so you should get her a Brooks saddle FTW.. If breaking that bad boy in doesn't give her a leathery tawinkle - then nothing will.. Quote Link to comment Share on other sites More sharing options...
10Speed Posted December 29, 2010 Author Share Posted December 29, 2010 sitting downstairs at the moment Quote Link to comment Share on other sites More sharing options...
KKtrips Posted December 29, 2010 Share Posted December 29, 2010 Guess who's getting a leathery tawinkle for New Years!! (unless you soak it in some lanolin or something for a decade before using it) Awesome bro - I love the style of a Brooks saddle.. Is it a sprung chassis?? Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 9, 2011 Author Share Posted January 9, 2011 ^ not a sprung saddle unfortunately - still looking for one at a reasonable price.... and in other news a parcel containing a new ring and a few other Vespa goodies showed up at the office this morning Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 10, 2011 Author Share Posted January 10, 2011 new ring new bearings, seals and gaskets various springs for clutch tuning (accidentally ordered 2 sets so if anyone wants to tune their scoot let me know) and a new crank, may receive further grinding for max breathing abilities (rotary induction is pretty cool) so now I have everything I need - may tear it down tonight, will see how I feel after eating... Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted January 10, 2011 Share Posted January 10, 2011 ooo so teh valve is part of the crank and not a separate disc... interesting induction surface does looks like it could do with a clean up though Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 10, 2011 Author Share Posted January 10, 2011 yeah the edges are a bit rough, though maybe helps impart some turbulence to the crankcase? will try to find some pics of other peoples and see if they've been tidied up... Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted January 10, 2011 Share Posted January 10, 2011 pretty sure there will be enough turbanance in the casing with that crank shlopping around at 10000rpm Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 10, 2011 Author Share Posted January 10, 2011 hmmm I suspect you raise a valid point Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 10, 2011 Author Share Posted January 10, 2011 Because the crankshaft serves as the rotary valve, opening and closing this port, the modifications made to it, directly translate into the modifications made to the port timing in the cycle. To calculate this, in degrees, just measure the diameter, dummy. I used a paper strip wrapped around the crank web, then i double-checked using the diameter, because the paper couldn't be tight or it would shortcut the recessed area of the crank web. Simple geometry will get you into radians of port timing, then degrees if you prefer. I'm not going to share all this, because I think this might be a competitive bike in stock cylinder racing, and I want a leg up on y'all, but if you really want to copy me you can probably figure it out from the picture. I also added some 'flow improvements' to the open area, sortof like knife-edging but in multiple dimensions. currently unsure what this means to me... Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 10, 2011 Author Share Posted January 10, 2011 engine is now removed and torn down... old barrel, minus porting of any note, plus significant scoring... seems it was a good time for replacement however as you can see new barrel will not fit... will take case to machine shop tomorrow to get it opened up a couple of mm - before case matching old vs new Quote Link to comment Share on other sites More sharing options...
johnnyfive Posted January 10, 2011 Share Posted January 10, 2011 I love this shit. I dig how quick you tear through stuff. Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 10, 2011 Author Share Posted January 10, 2011 I don't know if I tear in to stuff quickly... I think I tend to procrastinate. I was going to make a new years resolution to stop procrastinating but meh.... its still a new bike for my gf and she doesn't want it off the road for to long so that provides some motivation. Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 10, 2011 Author Share Posted January 10, 2011 case is now at machinists for boring, however they are running on reduced staff and it might not be done until next week )-: Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 21, 2011 Author Share Posted January 21, 2011 bloody dog has chewed up the new base gasket!! Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 23, 2011 Author Share Posted January 23, 2011 so got this all together in the weekend, no pics of the case matching as its a lot rougher than I wanted (probably should have found a mill to borrow instead of using my dremel)... Compression seems awesome, will measure tonight to confirm. But first kick nearly broke my ankle will have to use the decompression valve now. Unfortunately its not running - can't get a spark. How do you test a CDI? black areas show how much material was removed during case matching Quote Link to comment Share on other sites More sharing options...
10Speed Posted January 25, 2011 Author Share Posted January 25, 2011 how to test ignition side of stator - mine produced about 50v, which is plenty.... still not sure how to test cdi itself, but figure I know its getting juice so if theres no spark its to blame... will put the engine back in the frame tomorrow and see what happens... Quote Link to comment Share on other sites More sharing options...
10Speed Posted February 10, 2011 Author Share Posted February 10, 2011 lack of updates lately. Had heaps of trouble getting it to start, tapper was out on crank causing the fly wheel to bind on the case, and me to burn out the starter clutch trying to start it. So machined the flywheel down a couple of mm, and brought forward my plans to add a variated transmission and finally got it to run tonight, seems strong, should have it pulling wheel stands by the end of the weekend Quote Link to comment Share on other sites More sharing options...
10Speed Posted February 20, 2011 Author Share Posted February 20, 2011 well it was pulling wheelstands, frighteningly so. I will need to spend some tuning the clutch and vario. But in the mean time trying to get the exhaust to seal properly I did this... guess it's back to the machine shop tomorrow )-: Quote Link to comment Share on other sites More sharing options...
10Speed Posted February 25, 2011 Author Share Posted February 25, 2011 like a new one - only less brittle... Quote Link to comment Share on other sites More sharing options...
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