I have a '91 and am about to do a top end job on it. I want to modify the head for better performance. Anyone have a clue as to how much I should mill from the head. I don't want to run race fuel in the bike, so, I don't want to take too much off, but yet, I want to take enough off to make a difference. Any ideas?
Head Mods
- Thread starter cfr1970
- Start date
canyncarvr
~SPONSOR~
- Oct 14, 1999
- 4,005
- 0
Check out EGs website.
He has a list for do-it-yourselfers with squish angles, blend radii and stuff.
If you don't find it, drop me a line. I was there just last week...didn't bookmark it. Know it's there, though.
Anyway, I'll look for it and post the URL.
***edit******
Done. Glad I did.
Yes, I realize this is big bore info. If he posts THAT, I don't know why he wouldn't advise on 'regular' head info. It IS his livelihood. You chose to ask or not.
You'll have to all him, cuz this is all he has listed for kawi: (listed to show the type of info for you to decide if it's worth the call or not)
KAWASAKI
1991-2000 KX100 (from 82cc cyl.)
FSB: 54.500
PISTON KIT: Wiseco #651P8
GASKET KIT: Cometic #C7413
PORTING MODS: Exhaust 50mm chordal width, widen transfers, raise to 35.5mm
HEAD MODS: 54.5 diameter, recess .5mm, squish 15 degree no blend or width considerations.
VALVE MODS: Match
CRANKCASE MODS: None
1994-2000 KX150
FSB: 58.050
PISTON KIT: Wiseco #9203P5796
GASKET KIT: Cometic 1995-97 C7297 1998-2000 C7414
PORTING MODS: 1998-2000 cut cyl. Base 1.25mm
HEAD MODS: 58mm diameter, squish 6mm @ 7 degree angle, blend 20 degree
1998-2000 elongate head stay hole on head 2mm up.
VALVE MODS: Match
CRANKCASE MODS: None
1993-2000 KX300
FSB: 74.020
PISTON KIT: Wiseco #9050P7395
GASKET KIT: Cometic #C7304
PORTING MODS: Exhaust port raised to 40mm, transfers 59mm.
HEAD MODS: 1994 squish 14mm @ 12 degree. All models 74mm diameter, .5mm recess, 12 degree squish, 10mm wide (+1995) 30 degree blend angle.
VALVE MODS: Match
CRANKCASE MODS: None
from this URL:
http://ericgorr.com/twostktech/bigbore_specs.htm
He has a list for do-it-yourselfers with squish angles, blend radii and stuff.
If you don't find it, drop me a line. I was there just last week...didn't bookmark it. Know it's there, though.
Anyway, I'll look for it and post the URL.
***edit******
Done. Glad I did.
Yes, I realize this is big bore info. If he posts THAT, I don't know why he wouldn't advise on 'regular' head info. It IS his livelihood. You chose to ask or not.
You'll have to all him, cuz this is all he has listed for kawi: (listed to show the type of info for you to decide if it's worth the call or not)
KAWASAKI
1991-2000 KX100 (from 82cc cyl.)
FSB: 54.500
PISTON KIT: Wiseco #651P8
GASKET KIT: Cometic #C7413
PORTING MODS: Exhaust 50mm chordal width, widen transfers, raise to 35.5mm
HEAD MODS: 54.5 diameter, recess .5mm, squish 15 degree no blend or width considerations.
VALVE MODS: Match
CRANKCASE MODS: None
1994-2000 KX150
FSB: 58.050
PISTON KIT: Wiseco #9203P5796
GASKET KIT: Cometic 1995-97 C7297 1998-2000 C7414
PORTING MODS: 1998-2000 cut cyl. Base 1.25mm
HEAD MODS: 58mm diameter, squish 6mm @ 7 degree angle, blend 20 degree
1998-2000 elongate head stay hole on head 2mm up.
VALVE MODS: Match
CRANKCASE MODS: None
1993-2000 KX300
FSB: 74.020
PISTON KIT: Wiseco #9050P7395
GASKET KIT: Cometic #C7304
PORTING MODS: Exhaust port raised to 40mm, transfers 59mm.
HEAD MODS: 1994 squish 14mm @ 12 degree. All models 74mm diameter, .5mm recess, 12 degree squish, 10mm wide (+1995) 30 degree blend angle.
VALVE MODS: Match
CRANKCASE MODS: None
from this URL:
http://ericgorr.com/twostktech/bigbore_specs.htm
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