there are some adjustment screws on the carb that are factory sealed with a plug cap, so that you cant adjust them. I just bought a 2007 400ex used and when I got the the previous owner had twisted the idle screw pretty bad and the quad was stuck idling kinda high.The quad had run wonderfully before I replaced the cable. ... A forum community dedicated to Honda Twin cylinder motorcycle owners and enthusiasts. Bought this Honda HRX217HXA self propelled push mower used last week. I just acquired a Honda HR214 gas mower that does not seem to make power. The specs for the gxv120 call for about 2,000rpm at idle with the blade disengaged, and I was up around 3200 at idle, and around 3700 at top speed. I did the adjustment before the OBDIIc&c had the TPS voltage as one of the readings. Fast Idle To high is better than to low on a Honda also I did the Dyno-Jet thing on my 04 Aero and noticed the RPM were low at start up and high after warm up around 1300 RPM's now I just use the choke like I'm supposed to and I think the manual says 1100 to 1200 + or - so 1300 is within there range, If It's running good I wouldn't worry about it. ... Holy crap, this thing was about to fly apart! My TRX 250EX has been idling high, and I need help on how to lower the idle. What is the correct clearance on the intake/exhaust valve tappets? I can reach down and manually open the throttle and get the mower to come up to more than a fast idle. If someone could help me that would be great. Anything that upsets the the normal flow of air or fuel can render the adjustment useless. The "height adjustment" indicator where the handle attaches to the main part of the mower doesn't seem to have any moving parts. I'm working on a Honda HR214 SM mower. When I first got my Insight I had to change the idle set screw because idle was too fast even with the idle air bleed under the rubber cover screwed all the way in (1300 RPM). I have a video of me letting it idle and revving it a little. honda hr214 carb adjustment for altitude - DoItYourself.com Community Forums The "height adjustment" indicator where the handle attaches to the main part of the mower doesn't seem to have any moving parts. i tried cleaning what i could. i ordered a new carb off ebay to replace it, but i figured i'd tinker with the old one before i remove it. please help. Outdoor Gasoline and Electric Powered Equipment and Small Engines - honda hr214 carb adjustment for altitude - I've moved to 4500 ft and the lawnmower is woefully underpowered. I do not see any adjustment at the mechanical linkage where the cable connects and moves a control arm that in turn pushes on another linkage that moves the throttle. A friend gave me a self-propelled HR214 but the handle is stuck at such a low angle, it's impossible to use without hurting my back. my honda had a surging problem when it was almost new. A friend gave me a self-propelled HR214 but the handle is stuck at such a low angle, it's impossible to use without hurting my back. I can't figure out how to get the handle to swing up to a comfortable angle. The reading was 0.51v before I reset it to 0.48v with a DVM (9 TPS by the OBDIIc&c). How I restored my Honda HR214 lawn mower, lots of resources like manuals, parts diagrams, gxv120 rebuild instructions, and much more! I can't figure out how to get the handle to swing up to a comfortable angle. ... Can't understand instructions on adjusting valve to tappet clearance on Kohler K-301 12 HP lawn tractor engine. The idle mixture screw is intended to provide a fine adjustment to the fuel/air mixture at idle for a smooth idle. 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