TM Parts K9

Factory Data	MX80	MX125	Notes
IgnitionTiming	1mm (.03937")	1.3mm (.051")	Kokusan
Type Spark Plug	NGK 5 K OHM	NGK 5 K OHM	resistor type
Carburetor	Mikuni TM 32	Keihin PWM 38	.
Main Jet	220	178	use 200 main jet with needles shown below
Idle Jet	25	55	.
Idle Jet	25	52	using racing octane
Needle	6DL1-61	N 1 EC	125 use PGH (rich) or CEJ (lean) - clip in middle
Needle position	3	3	.
Needle position	3	2	using racing octane
Valve	3.5	6	(slide valve number)
Idle Screw	2 turns	1 - 1.5 turns	.
Spark Plug	BR9EG	BR9EG	.
Gap	0.7mm (.026")	0.7mm (.026")	.
Piston Clearance	0.06mm (.0024")	0.06mm (.0024")	Minimum clearance
Deck Height	0.75mm (.030")	1.7mm (.070")	Top of cylinder to top of piston at TDC
Volume	7.1cc	11.0cc	Combustion Chamber
Squish	0.9mm (.035")	0.9mm (.035")	Dimension between squish band to piston at TDC
Clutch	5/6	7/8	ferrous / friction - friction 1.5mm (.059")
Transmission capacity	.7 liter (.74 qt)	.7 liter (.74 qt)	.
type oil	ATFII	ATFII	Dexron, Mobil 1, Sunoco etc.
Gas/Oil mixture	3%	3%	2% using racing octanes
.	.	.	.
Transmission	Ratio	.	.
1	14/32	.	.
2	16/28	.	.
3	18/27	.	.
4	20/25	.	.
5	22/24	.	.
6	23/22	.	.
.	.	.	.
Primary	19/63	.	.
.	.	.	.
Please recognize that these specs are for motocross only application.			.

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