tortron Posted August 25, 2011 Share Posted August 25, 2011 next up, build a flat 8 Quote Link to comment Share on other sites More sharing options...
Truenotch Posted August 25, 2011 Share Posted August 25, 2011 Nah, square 32 Quote Link to comment Share on other sites More sharing options...
Simon Posted August 25, 2011 Share Posted August 25, 2011 Motor made with dicks. Quote Link to comment Share on other sites More sharing options...
phr34kr Posted August 25, 2011 Share Posted August 25, 2011 D3bj47TAYiU Quote Link to comment Share on other sites More sharing options...
Truenotch Posted August 25, 2011 Share Posted August 25, 2011 Cool. Build one of those for Hawkes Boes . Quote Link to comment Share on other sites More sharing options...
Hemi Posted August 28, 2011 Share Posted August 28, 2011 i only just realised (thank to snoozins comment) that this is a true horizontally opposed engine ... i have been having a few dreams about this and been getting shit together to make one ... BEATEN . i have however found that with the head plate its often overheats very quickly? . Is that whats causing the backfires on the burnout vid? this is seriously uncanny because ive been reading and getting info from the older guys at work about the ts3 commer motors etc . freaking sweet bike .. im going make one asap Quote Link to comment Share on other sites More sharing options...
sentra Posted August 28, 2011 Author Share Posted August 28, 2011 who knows, needs carburettors reconditioned properly / balanced / replaced with a single one so it can atleast have a marginally correct tune, ignition setup properly /( or looked at at all, as far as we know the timing may be heaps diffirent on each points/coil/plug assembelly) doesnt seem to get exceptionally hot judging by? the amount/smell of old grease and oil burning off barrells?, some guy told steven (who couldnt remeber is name?) to put tape on the open airfilter housings to increase air speed and even that in itself made it run 10x better. we may have another look at it before grinderfest (10th septemeber) in reality we will just put fuel in it and do burnouts, it does what it needs to do, hard starting and rough running is part of the parcel Quote Link to comment Share on other sites More sharing options...
peteretep Posted August 28, 2011 Share Posted August 28, 2011 fast135 is the master of the 2 smokes I think Quote Link to comment Share on other sites More sharing options...
rot808 Posted August 28, 2011 Share Posted August 28, 2011 semi keen to get this thing running semi ok if youre about that fast135 mainly keen for more drunk burnouts though Quote Link to comment Share on other sites More sharing options...
JoKer Posted August 28, 2011 Share Posted August 28, 2011 still wanna see a tire pop Quote Link to comment Share on other sites More sharing options...
Poo Posted August 28, 2011 Share Posted August 28, 2011 semi keen to get this thing running semi ok if youre about that fast135mainly keen for more drunk burnouts though Keen for drunk burnouts. yeah, it was me that suggested closing up the airboxes. 2Strokes dont like open carbs, unless they have been tuned for it. I think you should get two matching carbs. or get another motor and take each carb off the bike and tune it on the test motor. the next step would be to sort the exhaust. that shit looks cash as fuck, but if you can get the standard zorsts back on to test, i would do that. just like the intake, 2stroke exhaust is a crucial part of it. those long exhausts could just need a bit of back pressure. ie a washer welded on the end. and how many cc's are in the head when the pistons are at top dead center? what is the cc of the standard motor? Quote Link to comment Share on other sites More sharing options...
sentra Posted August 28, 2011 Author Share Posted August 28, 2011 aha, thanks kindly for your input, found some specs when i should be working, 3-1/2 H.P. bore (mm) 60.32500 stoke (mm) 38.1 displacement (cc) 108.99 compression 4.5:1 (!!!) which i think brings us to a chamber of close enough to 1cc (per motor, or 2cc in total) it had a flat head, so we didn't bother measuring anything except piston to head @ tdc , timesed it by 2 and set that as our piston to piston clearance at tdc, as far as carburetors go, do you think it would be easier to change to a single new china carb, or is it worth mucking around with the naffed ones we have, knowing that is not a strung out race engine. (there is no chance of getting the factory exhaust back on, it is integral to the fuel tanks) Quote Link to comment Share on other sites More sharing options...
Poo Posted August 29, 2011 Share Posted August 29, 2011 Yeah, can you get your hands on another motor? measure the compression on that one. then measure the compression on the twin. I think its safe to say you can up the compression a bit. whats in the common head on the twin? is there some sort of sqwish band in there? if its just a round ring you may have lowered your compression too much. a single carb could make things easier in some respects. but jetting it from scratch may drive you insane. if i remember right the carbs that you have are slightly different right? try and source two that are identical and keep with the twin carbs. and the zorst should have an outlet smaller than the exhaust port on the barrel. this will give it a bit of back pressure. or go the whole hog and setup a couple of expantion chambers!! Quote Link to comment Share on other sites More sharing options...
JoKer Posted August 29, 2011 Share Posted August 29, 2011 we did say it needed MOAR copper tubing Quote Link to comment Share on other sites More sharing options...
Yowzer Posted August 29, 2011 Share Posted August 29, 2011 Twin copper expansion chambers would be awesome Quote Link to comment Share on other sites More sharing options...
Steelies Posted August 29, 2011 Share Posted August 29, 2011 keen to see where this goes.. having mega carb/exhaust horiness issues on my racer too. it seems lucky it ever went round the track at all. Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 29, 2011 Share Posted August 29, 2011 but it did manu but it did Quote Link to comment Share on other sites More sharing options...
rot808 Posted August 29, 2011 Share Posted August 29, 2011 copper expansion chambers you say Quote Link to comment Share on other sites More sharing options...
Yowzer Posted August 29, 2011 Share Posted August 29, 2011 copper expansion chambers you say They should double as the handlebars. Quote Link to comment Share on other sites More sharing options...
EURON8 Posted August 29, 2011 Share Posted August 29, 2011 2stroke expert-i-ness See my build? Has a tatty as sticker on it saying ''active 650'' Sound right for a cc rating? seems heaps to me. Keen for maximum power from it for high speed runs expansion chambers porting high compression wish i could run small turbo tbh (will just blow by as ive heard) Quote Link to comment Share on other sites More sharing options...
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