Whats the fastest quad your Blaster has beaten?
- Thread starter billG
- Start date
About the only thing I can think of is that it needs a bigger carb. That's about all I can think of though. Compression is at 146psi, plug is chocolate brown through all rpms and jetting is spot on. Physically it runs and drives perfectly fine...it's just not faster than a stock 400EX. I had HDP bore and "rifle" out my carb to 30mm. My only guess is that it probably needs a 34-35mm carb to unlock better power. That's about all I can come up with. Another member on here "FLOTEK"...you might know him, knows Marc from Hollywood Dirt and knows his work or what was his work.
Have you tried to open up your airbox or remove the airbox lid and then re jet it????? I was able to go to a bigger jet after removing my air box lid....
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im with tater on this one, something must be wrong. i have a buddie with a 400ex and it has a +2 front sprocket, no lid ,some jetting work and a exhaust and i whoop his ass every time we race, it makes him sad haha 
the 30mm should be fine imo, what are you running for a reed setup?
the 30mm should be fine imo, what are you running for a reed setup?
Lid is off....Outwears cover is replacing the top of the lid, so it's more or less open.
im with tater on this one, something must be wrong. i have a buddie with a 400ex and it has a +2 front sprocket, no lid ,some jetting work and a exhaust and i whoop his ass every time we race, it makes him sad haha
Yea, I've heard this a lot, but I've never seen it on my blaster or my friend's blaster with Toomey pipe and filter. Not disagreeing, just saying. I had VForce Delta 2s?...I took them out, ported the stock cage, and put Boyesen Carbon Fiber Reeds on. Doesn't matter either way..I've ridden it with both.
Part of me thinks the stock 26mm bored to 30mm should be fine, but I just have this innate feeling a larger carb is what is holding it back. Contemplating purchasing a used 34mm 250R carb or just some general 33-35 Keihen(I can never spell that) carb and trying it out just to check it out and see. I've got quite a bit of torque and it pulls pretty hard through 1st through 3rd, but the 14tooth front sprocket kicks in and the gearing starts to slowly atone for less. If the 13 tooth was on there and it was offroad, it would rip through gears like no other. Quite torquey and responsive, which is one reason I just get the feeling the carb needs to be bigger. And yes, the jetting is spot on. I jetted it and it's spot on, had a Yama tech confirm it, and my friend confirm it by taking plug chops at each 1/4 of the throttle. I'm real picky about having jetting perfect.
My blaster.
Mods:
-Trenga Racing/LRD Specialties Chrome Pipe and Blue Powdercoated Silencer
-Full MX Stage 3 Port and Polish with rifled exhaust port
-Milled and rechambered head
-Stock 26mm Mikuni carb bored and rifled to 30mm
-Vito's Needle
-Bored .050 over
-Wiseco Pro-Lite Forged Piston
-Boyesen Pro Series carbon fiber reeds on stock reed cage
-Uni Air Filter
-Outerwears Air Box Screen Cover
-Tag X5 Handlebars
-Scott Grips
-+3 swingarm
-Flipped front rims
-T.M. Designworks Oil Injection Block Off(runs on pre-mix)
-Nac's Racing Gripper Seat Cover
-Polished Throttle Cover
-Motion Pro Brake Cable
-AC Front Aluminum Bumper
-Front Works Dual Rate Shocks
-14 tooth front sprocket upgrade
-Rear Douglas .190 Polished Aluminum Rims
-20" Rear Maxxis Razr Tires
-19" Front ITP Holeshot Tires
-Shaved Front Fenders
-Blue Painted Wheel Hubs
Mods:
-Trenga Racing/LRD Specialties Chrome Pipe and Blue Powdercoated Silencer
-Full MX Stage 3 Port and Polish with rifled exhaust port
-Milled and rechambered head
-Stock 26mm Mikuni carb bored and rifled to 30mm
-Vito's Needle
-Bored .050 over
-Wiseco Pro-Lite Forged Piston
-Boyesen Pro Series carbon fiber reeds on stock reed cage
-Uni Air Filter
-Outerwears Air Box Screen Cover
-Tag X5 Handlebars
-Scott Grips
-+3 swingarm
-Flipped front rims
-T.M. Designworks Oil Injection Block Off(runs on pre-mix)
-Nac's Racing Gripper Seat Cover
-Polished Throttle Cover
-Motion Pro Brake Cable
-AC Front Aluminum Bumper
-Front Works Dual Rate Shocks
-14 tooth front sprocket upgrade
-Rear Douglas .190 Polished Aluminum Rims
-20" Rear Maxxis Razr Tires
-19" Front ITP Holeshot Tires
-Shaved Front Fenders
-Blue Painted Wheel Hubs
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with a +2 on that 400 his max speed would increase but in a dragrace he would be slowerim with tater on this one, something must be wrong. i have a buddie with a 400ex and it has a +2 front sprocket, no lid ,some jetting work and a exhaust and i whoop his ass every time we race, it makes him sad haha
if you kept the 13 tooth it would help in a race. a 30mm carb would help too like you said
really?? lol
. yeah im talking a top speed race up the road. its not even close. OP sounds to me you might have a bit of a hanging idle wich could signal a small airleak but i dont think thats your issue. you dont really have much engine work but enough that you should get that EX, only thing i can think of is your porting is off, i know you said the guy had good rep but was he skilled with blasters specifically or 2strokes at all? seems alot of shops aroudn here consider a port job just opening eveything up and not paying attention to durations and angles adn whatnot.
really?? lol
Poster "FLOTEK" knows his work if you know Marc at what what Hollywood Dirt. I'd say his engines were pretty legit considering they won multiple national races and beat Dustin Wimmer.
I don't have pics of his work unfortunately. I'm sifting through remnants of old conversations with other posters from long ago to see what I can find. Sucks Marc had the fall out he did with divorce and his corrupt business partner(or so I've heard).
Poster "FLOTEK" knows his work if you know Marc at what what Hollywood Dirt. I'd say his engines were pretty legit considering they won multiple national races and beat Dustin Wimmer.
well as you can tell by the huge FLOTEK sticker on my quad im a big fan of his work and if he says your guy does good work then im sure he does. i guess i dont know what to tell ya man, get a new carb and try but i dont think its gonna be the night and day differance you are looking for but mabey because yours is bored out so far its causeing problems. :-/ :-/. good luck dude
here's my old blaster w/a flotek ported CT top end, 3mil crank and a stock trans. It ran 5.3 all day long. It's the same blaster that in my avatar. 38mm keihen, vf3, power pros pipe, ect, ect..... your setup is key, you could the best port work in world w/stock parts backing it up and prolly be slower than stock. 99lrd, you need to go w/ a 35mm air striker, some vf3's, and an open air filter. The LRD pipe works well, but a good oof pipe will prolly net you about 1.5 to 2 tenths in 300'. In your gearing you could prolly go 15 & 38 on a 20" tire. lower the front, stretch the swinger & go rip that ex a new one!! and by the way you can make a blaster outrun any stock atv, I know because we have done it!! YouTube - Yamaha Blaster takes Can am @ busco drag
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I don't want a drag bike. I ride mostly trails, but even so it should be faster. A lot of success stories from people running the Keihen/250R 33-35mm carbs with a setup similar to mine, so I'm going to look into it eventually. Just have to see what I can get a deal on. How did you guys go about swapping out the intake boot and boot that meshes up with the reeds with a larger aftermarket carb? I'm fairly content with the airbox setup as it is now, but I kind of figure with a filter on a new, larger carb, it would be easier just to clamp on a filter, throw on an outwears, then I can just make an aluminum box protect it from the elements of the trails.
took down my buddies brute force 750i friday night . 2 miles down a major road once he topped out and started hitting his rev limiter at 69 i went right by I:I. lololol i think this is the first serious post i have ever put in this chocked full of BS thread hahaha
. 2 miles down a major road once he topped out and started hitting his rev limiter at 69 i went right by I:I. lololol i think this is the first serious post i have ever put in this chocked full of BS thread hahaha^ awsome.. i beat a 400ex at busco with paddles and a wheelie bar. thats like 50 hp right there!!
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