i finaly got beat today by a 400ex with a 440bbk and stage 2 cam he beat me b 2 or 3 foot next time i race him i want to smoke him any ideas i know i need a better exaust but becides that any ideas my mods are in my sig
how to make my blaster beat a 400ex
- Thread starter mud runner
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i would love to have ken port it but i dont have that mutch cash and im working on a spare head i have
change gearing to 14 40...... thats wht i have i like it alot better, but if you track race i would suggest wht u have or 13 40
iv got a 13 front 44 40 rear sprockets too but raceing short distance that gearing should help me and i have too big of a main jet in it
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a 12:42 gearing is slower on each side! its no wonder he beat you!
Get a bigger front and a smaller back...
I have seen one guy run 15:38 which is crazy, but thats real speed, and you need power for that I:I
Get a bigger front and a smaller back...
I have seen one guy run 15:38 which is crazy, but thats real speed, and you need power for that I:I
i disagree with you short distance my gearing is better but longe distance 13 40 is better
Long distance is better to have 14:38
13:40 is stock, and its good for short runs. You could probably start in third gear and be fine if you rev and drop, shifting faster than a racer
13:40 is stock, and its good for short runs. You could probably start in third gear and be fine if you rev and drop, shifting faster than a racer
Considering the $$$ in that EX you did good. I:I
http://www.blasterforum.com/engine-13/cylinder-porting-diy-25773/
Maybe this too : http://www.blasterforum.com/engine-mods-swaps-129/improving-velocity-48827/
Dremal, flex shaft, 20 Piece 1/8" Shank Rotary Diamond Point Tips or 50 Piece Diamond Mounted Point Set You can at least get the transfer port openings with the ball tip to smooth the liner and some of the cast aluminum.
Raise ex port 1/64 -1/32 MAX widen about same on both sides, properly champher all port openings. Open ex to inside dia of gasket blending back to opening.
I think the DIY covers most the rest. I:I
http://www.blasterforum.com/engine-13/cylinder-porting-diy-25773/
Maybe this too : http://www.blasterforum.com/engine-mods-swaps-129/improving-velocity-48827/
Dremal, flex shaft, 20 Piece 1/8" Shank Rotary Diamond Point Tips or 50 Piece Diamond Mounted Point Set You can at least get the transfer port openings with the ball tip to smooth the liner and some of the cast aluminum.
Raise ex port 1/64 -1/32 MAX widen about same on both sides, properly champher all port openings. Open ex to inside dia of gasket blending back to opening.
I think the DIY covers most the rest. I:I
This is in addition to your head mod (check squish when done) and a good pipe.
Also now is a good time for you to read Gorden Jennings and H. Grahm Bell
Also now is a good time for you to read Gorden Jennings and H. Grahm Bell
Considering the $$$ in that EX you did good. I:I
http://www.blasterforum.com/engine-13/cylinder-porting-diy-25773/
Maybe this too : http://www.blasterforum.com/engine-mods-swaps-129/improving-velocity-48827/
Dremal, flex shaft, 20 Piece 1/8" Shank Rotary Diamond Point Tips or 50 Piece Diamond Mounted Point Set You can at least get the transfer port openings with the ball tip to smooth the liner and some of the cast aluminum.
Raise ex port 1/64 -1/32 MAX widen about same on both sides, properly champher all port openings. Open ex to inside dia of gasket blending back to opening.
I think the DIY covers most the rest. I:I
ya the 400 probably has 2 or 3 times the money in the motor than mine does
heres my intake
this is the cylinder on my new bike im building but this is what my transfers look like i dident have a pic of the transfers on my bike 
ya the 400 probably has 2 or 3 times the money in the motor than mine does
heres my intake
The ports could be opened up some and the casting flaws should definatly be cleaned up some.
What was done to the exhaust because that iss where most of the power gains come from.
You should expect to experience little or no power gain with that amount of work that was put into the inlet.
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