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5 races for a pushed engine is good.. thats 5 races + the practice session. thats about 10 hours of full throttle riding.. after that much on a high output engine, you need to AT LEAST disassemble it and check your tolerances and clean everything. a stock 125 should do a...

cmon, dont freak the guy out.. the engine wouldnt run if the piston was in the wrong way. the plug may be shorted.. its when the oil permeates the ceramic insulator. no burning or cleaning will fix it. get a box of 10, you can usually save a few bucks in the long run. change the plug.. if it...

on the 03/06, disconnecting the TORS is really easy... there are two THIN wires that go into the CDI box.. these are the TORS wires. Cut them both.. Ground them both... your engine will now idle but not run above idle speed. you need to disconnect one of the wires from the ground to get it to...

You should NOT port the boost window in the back of the piston. if you have the patience to do it accurately, you SHOULD port the sides of the piston skirt so they match up with the bottom of the transfer ports. you know, on the bottom of the side of the piston, the cut out aligns with the...

go one or two numbers bigger on the main jet and see what difference it makes to the bikes powerband. If it becomes to peaky or pipey with no low end and then a WHAM when the revs get high enough your a bit too rich.. the main jet will change the way the engine feels, so try it. see if you...

whats the software called if you dont mind me asking?

my friend has a 92 blaster and it still hasnt failed... i think if you mod it alot, and raise the engine speed with porting, carbs, pipes etc the nylon gear gives up and breaks and doesnt spin the pump any more.. if your stickin to stock, Id keep it myself, but thats just me.. simply because...

yeah, my deck height is .1 mm thats where i get my 1.4 mm squish clearance.. 0.8is from my gasket, my chamber is recessed by .5 mm and my deck is .1.. so .8 + .5 + .1 = 1.4mm

did you check the side clearance on the con rod bearing? if someone replaces the big end bearing and pin and doesnt get the clearance right, it makes the crank wider or narrower leading to this problem when you re assemble the cases. its what oconnor said, and now that youve tapped it, its...

you mean you have one of those little programs that calculates msv? i need to get me one of those..

im running a keihin carb and the numbering on the jets is different.. im running a 160 main, if i run a 165 the top end is flat and it bogs. if i run a 155 its spot on, never bogs and rips! so its already a bit on the fat side.. my minimum squish clearance was 1.4 mm but im afraid that...

rubbersalt, the top of the port is actually 32mm from the deck (i had figured 33 from the deck to more accurately work out my trapped volume given the way my exhaust port roof is curved to preserve ring life), and the port floor was lowered to the lowest position the piston will go to (BDC)...

thats because no one does steady state dyno testing.. or do they?? all they ever do is transients. its not gonna show there! the only place a bottle will work is at its fundamental frequency which you can tune to fill in a small hole in the torque curve someplace. also, power curves are very...

forget the spacers and bottles. best get an exhaust or a better filter and a jet if you dont have money hanging about.. but lets not completely kill the idea of a boost bottle. some cars use then and some race engines as well. just not the blaster..

thats basically what the Keihin PWK35 airstriker has its like an extra jet that you can tune just by twisting a screw. dont know to be honest! but if your looking for more performance, you need more mass air flow through your engine. so you need to get a high flow filter and use a bigger jet to...

^^ id have to agree I believe the rod from RD350 is 115mm long and will fit the blaster crank?

i dunno why no one has made a decent boost bottle for a blaster.. Yamaha used to use them on some of their older bikes. it was called the YEIS. heres a link detailing it (could find english, sorry) but it gives you an idea of how it works .:::: Ciclo 2 tempos-Tudo sobre Motos On-Road/Off-Road...

the problem is that the dt/wr 200 changed at some point.. the DT/WR200 from before the 90's has the same cases, and your blasters exhaust will even fit if you put the DT engine in your blaster frame because the cylinder angle is the same. early in the 90's the DT engine changed (different cases...

yes, i have used one.. though it was only to get a PJ34 carb to fit in the place of the stock carb. It seemed to level out the power delivery softening the hit of the engine coming on pipe. it depends on your porting if any. if your experimenting, you could also try a boost bottle although...

i dont remember what my exhaust duration is, and i dont have my laptop with software. can someone run the numbers; ur a techie, u must have some software? stock blaster stroke and rod, exhaust port opens 33mm below the deck deck height is 0mm piston pin offset is also 0mm i was aiming...