just had a look on the internet and this web site quoted (Wiseco Yamaha YZ 125cc piston. Notice the deep hole in the side. This gives a bit more fuel mixture.) which is mad lol so looks like its there to give more fuel
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
and found this must be a performance piston as its a smooth hole defo not been drilled
If you've recently bought a Wiseco piston for a two stroke with an exaust bridge you'll probably read in the instructions about drilling lubrication holes in the piston to help lubricate the exhaust bridge. Without these holes the front of the piston and the cylinder wall will tend to get starved of premix oil causing excessive heat and wear at these points, and in extreme cases causing the piston to seize in the cylinder. Even with the holes drilled, you'll probably see a bit of wear on the front of a piston which has a few hours on it - there will be a worn down flat area on the piston where it lines up with the exhaust bridge.
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
wouldnt bother with the 170kit mate = problems + dont realy do much top end wise just get abit more pull but the kits aint reliable at all .. go for a stan stephens stage 3 http://www.stanstephens.com/
got anything to back that up im not trying to be an ass just i dont like pepole going right out there making a statement with nuthing to back it up lol
i dont see how a plated barrel with a forged piston could cause more problems than the stock out dated steel linerd barrel
i have heard and buy the looks of the the porting on the athena barrels as on the reliabilty side more than proformance
??? back wat up lol u mean te hole in the piston ??? i was looking at info on certain websites n for the athena 170cc kit i did not post that lol i will port my own cylinder
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
few more pics today decided to clean the head and start painting the frame but then decided no point as need to re do frame due to previous owner modding the frame
do u no what mukka i thort you were a little nob that wished he had a dt and thort he new everything but to be honist i take my hat off to ya, your a guy that likes to try anything and you realy take an interest in your bikes, fair play to ya fella you seem to be doin a good job and i seem to understand what your trying to aim for with your bike. good luck and will look forward to seen it finishd
cheers mate not a problem i do alot of bikes its not my 1st i have a up and going website and business at moment i used to do scooters and 50cc geared bike ssuch as dt50 or derbi sendas this is summat new and alot of fun i take pride in all my projects as i like people to come to me if they need a job doing and cheers
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
on the engine all i used was a brillo pad then went over with enamal engine paint to make it look better and frame is black enamal paint too better for the bad weather
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
few more little updates as snowig so limited to what i can do now lol so decided to put exhaust on engine and try get angle right for the exhaust as different on the derbi frames
-- Edited by dt_powerd_senda on Friday 7th of January 2011 02:03:16 PM
today i just recieved a freebie dont know where it come from but had my name on it and i have not payed for it lol nice to know people sending me free stuff anyway who ever it was cheers lol
lol ye same here i was lookin at my ebay stuff and defo did not buy this but am sure i can put it on see if make difference in gearing now :) anymore freebies lol
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
exhaust will be all painted once in position and welded up and no petrol tank in the pic its in half at moment as modding it as carb hits on it at moment
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
Cool cool, when do you plan to have it all finished mate?
ok just taken the time to read the rest of your thread and i see what your up to with ya exhaust, should have started from the beginning in the first place. Yeah man all lookin sweet!
-- Edited by Spartan on Friday 7th of January 2011 06:16:01 PM
i got the bike like that in 1st place now just sorting everything out on it to get it to its glory days :) but should be a week or so if the snow goes away lol
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
snow, yeah been hearing about that, absolutely zip down by me (bournemouth). Just raining stupid amounts which is a bum as I was hoping to get out this weekend for a play if it was going to be dry.
Just a question senda, how where you gonna go about doing your frame before you decided not to?
Sorry mate I thought you were going to re-paint your frame but decided not to in the end, just wanted to how you where going to paint it - re-spray, powdercoat
oh sorry lol its half painted at moment using engine enamal gloss black paint at the moment it just frame n wheels out side will be finished once snow goes lol
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open
could you re-paint the whole frame with that then, mine needs doing as rust has appeared in certain places from where the previous owner kept it outside. I can't decide the best way to get it done - when i do eventually get round to stripping it that is
ye mate its really good thick paint and all weather proof as used on engines so its heat proof too ill post sum pics once i finished the frame so u can see
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dtr 125 engine in derbi senda full arrow exhaust pipe 30mm mikuni carb full power cdi power valve fully open