Who has port or bore mods?

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Who has Port or Bore Mods?

Port modifications on 200 - big difference
2
11%
Port modifications on 200 - little difference
0
No votes
Bore and Port mods on 200 - big difference
3
16%
Bore and Port mods on 200 - little difference
0
No votes
Port modifications on 220 - big difference
2
11%
Port modifications on 220 - little difference
1
5%
Bore and Port mods on 220 - big difference
1
5%
Bore and Port mods on 220 - little difference
0
No votes
None and never will
10
53%
 
Total votes: 19

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Jeb
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Who has port or bore mods?

Post by Jeb »

Interested in who's gone a little further than RB mods. Add a comment or two (or more!) to describe how things changed - for better or worse . . .
"No farmer ever plowed a field by turning it over in his mind" -George E. Woodbury

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Rick
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Post by Rick »

I cant beleive you forgot the guys that ride with you, time to time....250! I dont think Ive got any anyway :lol:
Yes, they really do let me drive the Train!
1991 KDX 250 $Sold but not forgotten....
1996 Suzuki DR 350 $Sold!
2002 Honda CR 250 worth more than my house at this point........ :-)
2004 DR 650se Road Warrior
2002 DL1000 V-STROM
performancecycle
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Post by performancecycle »

I have only had my latest kdx 200 for a few months but, will soon be tearing it down to do the wiesco piston and the head and carb mods from r&b. Also
I will be polishing the fuel and air passages in the jug as well. So far I have
trimmed out the top of the air box as much as possible, tore down the carb and polished out the bore to a mirror shine and replaced the stock exaust with a full fmf system and I have noticed a great diffrence in the bike. Stock tires suck too, and I have changed the rear to a 120/90/18 mitas hard compound C-04 cross rear. What a diffrence! Next will be a bridgestone
M-101 front tire, as about as sticky as they come!
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Indawoods
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Post by Indawoods »

Polishing is a bad thing.... you need the fuel to atomize... this is done with turbulance from the rough ports. It will spoo badly if you polish the porting.
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****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
performancecycle
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Post by performancecycle »

Do you know who to send the jug to to have this done correctly when the time comes? I have had this done on a yz 125 and it seemed to have better power in the power ban but did foul plugs at low rpm even at 50:1 that was probably due to the atomization of fuel as you speak of. Our local "expert"
did the work but I have seen many questionable machine practices come out of his shop and seems like a real expert would know about fuel atomization.
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scheckaet
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Post by scheckaet »

eric gorr would be my choice for porting, or FRP
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Indawoods
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Post by Indawoods »

Eric Gorr....
*** Administrator //***
****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
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WNC
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Post by WNC »

>|<>QBB<
Indawoods wrote:Polishing is a bad thing.... you need the fuel to atomize... this is done with turbulance from the rough ports. It will spoo badly if you polish the porting.
Alright, enlighten me on this one.
I changed out engines a few weeks back from bone stock to a ported
polished engine. This spoo you speak of is apparent on the latter.
I been fooling with jetting and fuel mixing. Its not fouling plugs either.
It also is stronger than the stock engine, has a 4 stroke-like grunt to it
also. I have'nt fooled with the reeds yet, simply because I enjoy the 'hit'
that it has currently.

But back to the spoo, this thing spoos even after the engine has been
stopped. :lol: Gravity is pulling down from the silencer and its dripping
from under the rubber seal at the pipe.

So all that is associated with the port/polish job?
95' KDX200
19" rear wheel/blk Excels
ported/polished head
FMF Gnarly
FMF Power Core 2
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Indawoods
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Post by Indawoods »

The main culprit on spoo IMO is the added Alcohol and "enviromental" additives in fuel. It is exasperated by polishing ports. The air running across the polished metal makes the fuel come off in droplet form vs. atomixed form caused by the rough surface.... so you get a larger amount of unburned fuel running through your bike causing more spoo than normal.

I am trying Tolulene this next weekend trying to put spoo in check. Others have said that it helps allot. 5-10% is supposed to do it.
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****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
performancecycle
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Post by performancecycle »

Let us know how the tolulene works out and were can I buy it, how much etc.
I work as a tech inspector at a local legend car track. I will see what I can find out about the subject this weekend. Thanks inda.
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fuzzy
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Post by fuzzy »

Speaking of fuel tech....Tolulene 'enhanced' gas will pass sniffer, because gas has tolulene in it already....Gas with 10% ethanol in it won't though.
'91 KDX 200 Project $300 KDX
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
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