DT125R ARCHIVE

to NOR DT

see how the flow is better

 

NORFE wrote:

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the less ristriction you have or things blocking the flow of charge, the faster it goes in and out the better it will perform, look at how a turbo works it pumps in and sucks out...

 

liking the boost port idea where did u find that pic?

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 found it while googling pics of "tzr 4dl sp" been trawling the net loads to get as many reference pics as possible to try and size them up? think fuggie on here had a go at doing them but could only get to one? tis o sod figuring it out BUT.... i think with a little thought its do-able. got some more pics off the club dtr portugal site,i saw the port measurements on there and dint book-mark it like a gimp lol

they almost look like they could be drilled from the exhaust port on a drill stand (once the agles are figured out) and then grind thru from the cylinder to connect them? or am i talking horse ****e lol?

yeah they look very nice them extra ports ,any thing can be done with the right tools, to port 2 strokes proply u need a right angle  drill like dentists use, and theres now soft ware to do the mapping in 2d to transfer on to the barrel with port maps, will post sum pics later of what i mean

get one of these badboys for your dremel

http://www.ebay.co.uk/itm/180710996752?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

and a flexi drive thing can get into the smaller bits ands its easier to use

http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.2stroke-tuning.com%2Fmoped-forum%2Ftopic%2F90663-projekt-3mb00-uberstroemer-angepasst%2Fpage__st__20&act=url

lol great minds think alike karnage lol i ordered one of those yesterday  bit cheaper than $700..... and cheers the only way for that link. he's cut a huge amount of metal away  i'll have a look through that and see what i can use on my own. did think about having the liner pressed out. would make it far easier to do the boost ports... i think the sp has a nikasil plated bore from what i've read? just a pity you cant get sp heads,we'd all be happy....

that sounds about right. the port template thing is intersting,never seen that before. clearly i'm not looking hard enough  looks like i've got loads more to watch and read up on lol think my brain might explode 

thats insane! 166 times a second :O cant even imagine how fast that is moving

i was just going to say thats the way to do it

in that gordon jennings it tells you the how to do it

thats the hard way to do it lol its mad how much easier computers have made it all  

aint that the truth! still searching lol the cylinder base port measurements can be calculated from a photo (resize the photo so the bores the right size and measure off the screen lol) shouldn't be too far out. its the other sizes though (and if they reshaped the ports or not) 

also does anyone know where the power peaks on a unrestricted dtr with a dep pipe?

twisting my melon maaan

yh it is, i had to read every paragraph about 3 or 4 times before i started getting to grips with it

dont know just yet  but it has dtr transfers and inlet ports as far as i can make out. if it worked or not is another matter lol