Bore	Stroke
	Kawasaki	56	50.6
	Honda	54	54.5
	Yamaha YZ125	56	50.6
			Port Height (mm below top of cylinder)				Port Opening (ATDC)
	Year	Model	Main Exhaust	A x-fer	B x-fer	Boost	Main Exhaust	A x-fer	B x-fer	Boost		Port Follows Delay
	1988	KR-1	29	39	39	40	91.5°	116.5°	116.5°	119.4°	24.96	0.0	2.89
	1994	RS125	28	41.5	42	42.5	84.2°	114.6°	115.9°	117.2°	30.37	1.3	1.33
		RS250	27.1	41.3	42.4	43	82.4°	114.1°	117.0°	118.6°	31.70	2.9	1.62
	1995	RS125	28.1	41.5	42.3	42.8	84.4°	114.6°	116.7°	118.1°	30.17	2.1	1.35
		RS250	27.1	41.3	42.4	43	82.4°	114.1°	117.0°	118.6°	31.70	2.9	1.62
	1996	RS125	28.1	41.5	42.3	42.8	84.4°	114.6°	116.7°	118.1°	30.17	2.1	1.35
		RS250	27.1	41.3	42.4	43	82.4°	114.1°	117.0°	118.6°	31.70	2.9	1.62
	1997	RS125	27.2	41.2	42.2	42.7	82.6°	113.8°	116.4°	117.8°	31.24	2.6	1.34
		RS250	27	41.5	42.5	43	82.2°	114.6°	117.2°	118.6°	32.43	2.6	1.36
	1998	RS125	27.2	41.2	42.2	42.7	82.6°	113.8°	116.4°	117.8°	31.24	2.6	1.34
		RS250	27	41.5	42.5	43	82.2°	114.6°	117.2°	118.6°	32.43	2.6	1.36
	1999	RS125	27.2	41.2	42.2	42.7	82.6°	113.8°	116.4°	117.8°	31.24	2.6	1.34
		RS250	27	41.5	42.5	43	82.2°	114.6°	117.2°	118.6°	32.43	2.6	1.36
	xxxx	KR-1x	25.5	38.5	39	39.5	83.7°	115.1°	116.5°	117.9°	31.41	1.4	1.43
	vlookup 50.6		vlookup 54.5
	25.5	83.65	27	82.17
	25.6	83.88	27.1	82.38
	25.7	84.1	27.2	82.58
	25.8	84.32	28	84.23
	25.9	84.54	28.1	84.43
	26	84.76	41.2	113.82
	26.1	84.99	41.3	114.08
	26.2	85.21	41.5	114.6
	26.3	85.43	42	115.9
	26.4	85.66	42.2	116.43
	26.5	85.88	42.3	116.7
	38	113.68	42.4	116.97
	38.5	115.06	42.5	117.23
	39	116.47	42.7	117.77
	39.5	117.9	42.8	118.05
	40	119.36	43	118.59