ESR 325 yz250 big bore kit review - Yamaha 2 Stroke - ThumperTalk
网页2017年12月29日 — Ive always loved the versatility and fun factor a yz250 2 stroke has (track/woods/ whatever) and wanted more power- plain and simple- I own an Af500, a '15 yz450f and have had bikes for 20 years- I ride track intermediate and woods as fast as some of the better guys- a 450 in the woods was a tank- …
YZ250X Power Jet Zero - Yamaha 2 Stroke - ThumperTalk
网页2021年2月11日 — If you take 2 YZ250's BOTH running/tuned optimum but BOTH using different jetting. The YZ that is using more fuel and air will be producing more power. Internal Combustion Engines (ICE) requires the MAX , usable, Fuel/Air mix to produce the max power. It is the basis of their design.
Quick reference YZ250 jetting chart - ThumperTalk
网页Posted May 23, 2008. Here's a quick reference jetting chart for '01-'08 YZ250's. It was made by taking Yamaha 's manual recommendations and using the density altitude calculator to correct for altitude and temperature. -If you will be racing or running in open desert conditions, richen each jet by one size and the needle by 1/2 step.
What is the right gearbox oil to use in an YZ250 2st?
网页yathump. Posted March 30, 2008. Thank you for the outstanding write-up:worthy: Any decent 10W-40 oil, 80/85W gear oil (approx. equivelent to a 25W engine oil), or ATF type F will work just fine.
YZ250 Timing Thread - Yamaha 2 Stroke - ThumperTalk
网页2008年7月26日 — Also, keep in mind that these indicator-advance specs are unique to the '99-'09 YZ250 because of it's. flywheel-stator relationship, stroke, rod length and CDI advance programming. The results:-The whole area behind the flywheel is …
SURVIVAL OF THE FITTEST: THE YAMAHA YZ250 2-STROKE STORY
网页2021年2月16日 — 1985 YZ250 Jeremy McGrath is probably better known for his years at Honda, but in 1998, 1999 and 2000 he won Supercross titles on a YZ250. In that time his closest rival was fellow Yamaha YZ250 rider David Vuillemin. The last National Motocross Championship to be earned by the YZ was the 2004 Supercross title with Chad Reed. 1987 YZ250 OFF-ROAD
Yz250 Clutch basket question - Yamaha 2 Stroke - ThumperTalk
网页2023年1月26日 — Then the washer (#16 in the diagram): Inner collar (#14): Bearing #15: The clutch basket (#6) and spacer washer (13): Then I slid on the hub, lock washer and nut. I torqued to 50 ft/lbs. The hub and basket still spin together (no steel or friction plates). Basket should spin with the engine, shaft and hub with the front sprocket.
yz250 year to year changes? - Yamaha 2 Stroke - ThumperTalk
网页2007年4月18日 — 1993-1995 same. 1996 - 1998 redesign and dark blue plastics. 1999 - up engine redesign, brighter blue plastics but same design (1996-2001) 2000 - air box white & new front fender. 2001 - seat cover got black top. 2002 - redesgin with frame, swingarm and plastics changed and new kickstarter. 2004 - went to 48mm forks.
YZ250 or YZ250X? - Yamaha 2 Stroke - ThumperTalk
网页2015年10月4日 — If you want to beat guys on 4 strokes, or ride anything technical or just ride faster for longer, then: 1. The stock YZ250 1999-2015 motor doesn't have broad enough power. On/off pipe is stone age. 2. The stock suspension is too firm or harsh. The 250X will have broader power, mainly via the head and porting setup.
What is a good ratio to mix gas/oil at for a YZ250
网页2013年6月2日 — My Rides (3) 32:1 is a good safe ratio. 60:1 retarded not useable in any modern 2 stroke. 20:1 is what pros would run in factory 2 strokes back in the day. 32:1. Blasphemy!! I have been running amsoil interceptor @ 50:1 for over 2 years and 0 problems. In fact 2 of my buddies run amsoil and never had any problems either!
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