05 Trx450r

[Bad Habit]

'05 TRX450R

Stock
-bore
-stroke
-valves

ported ESR intake
42.5mm straight bore FCR
HRC cam (straight up)
ported head (HVP on intake)
13.75:1 HammerHedz piston
Ron Wood exhaust
Dyna ignition - curve 1
TT111 leaded fuel (non-oxy)

Runs were stopped before 10k rpm, I'm getting ready to drive 1600 miles for a week long riding trip and didn't want to over stress the motor.

Not sure why it shows as a link instead of the image, it's a jpeg and has the img tags around it.

[kgbg]

Thats an AWESOME powerplant.
Good job, will you let me ride it?

[Bad Habit]

You bet Kam. But you'll have to wait about 3 weeks for the ride.

And for some perspective, this same dyno shows a stock 06 YFZ at 33.04hp.

[JOEX]

The graph.....

[slamdak8782]

dang now I want a 450. who wants a 400ex?

[chad502ex]

sweet pulls Dan. I bet that machine rocks!!

Seems like your HV porting performs real good.

what is meant by "ported" esr intake?

I love the 8-10 k range where power increases and doesn't decrease like most others do.


Very impressive combination to say the least!

[Bad Habit]

The tube or stack that comes with the ESR airbox eliminator kit is horrible. The tube needs to make a bend and taper down to a smaller diameter. To accomplish this, they use a smaller tube and simply weld it to a larger tube at an angle. This leave a gigantic lip inside for the air to try and flow around. This lip/transition area received a good amount of "porting" to make it smoother to reduce the amount of turbulence as much as possible.

[chad502ex]

Originally posted by Bad Habit
The tube or stack that comes with the ESR airbox eliminator kit is horrible. The tube needs to make a bend and taper down to a smaller diameter. To accomplish this, they use a smaller tube and simply weld it to a larger tube at an angle. This leave a gigantic lip inside for the air to try and flow around. This lip/transition area received a good amount of "porting" to make it smoother to reduce the amount of turbulence as much as possible.

Great info, thanks!

[slamdak8782]

this quad was velocity ported? Do you know what percentage they took the choke point too?

[chad502ex]

Originally posted by slamdak8782
this quad was velocity ported? Do you know what percentage they took the choke point too?

Most ppl velocity porting are going with about a 30 to 35% reduction as suggestion by MotoMan (http://www.mototuneusa.com/think_fast.htm)

I believe this is a picture of Bad Habits HVP.

Looks great and seems to really put down great numbers on the dyno (as illustrated above).

I'm not saying that BH doesn't have this right, cause apparently he does, but it really takes some fine tuning of the port shape and beginers can inadvertantly cause performance to go down instead of up if they don't get it right.

Anyway, here is a picture of his porting then I'll explain a bit more about what i mean as followup and maybe Bad Habit can comment further as discussion.