I've purchased a Honda CX500, and been working it for about a month ish now. Only problem was the throttle lagged, which I tried to fix by cleaning pilot valve. I also took the tank off because there was bad gas in it, but it ran fine otherwise before that. Cleaned that tank, new gas, fuel line, and carb clean with the float bowl off. (Prev owner JB welded it) Went to start it up, and would only go with choke fully in. After a bit of starter fluid, it would run consistently, but due as soon as the throttle was hit. Then I stupidly messed with the mixture screws thinking that would fix it, now it won't start at all. I realize my mistakes, but I don't know what is causing all of this. I've been doing looking and a buddy of mine says it's a air leak somewhere, which I have to find by just spraying starter until it starts, ergo finding the leak. I've never posted on here, but I know there's far reach here, so hopefully I can get some help. I'm using non ethanol gas btw.
>>29017216>i need a 300 lbs 60 horsepower motorcycle because uhhhhhhhhhhhhh i plan on going 170mph
>also i dont plan on needing to rev it any higher than 2,000 rpm or go higher than 2nd gear
It's my first bike :(I just wanted to try something new I've worked on old cars for a while never bikes
Reset the carb settings first.A good starting point for carb settings is to LIGHTLY seat the mixture screw, then open it 1.5 turns, the slide stop screw depends on the bike what's the optimal starting point, but you can try screwing them in completely first for the bike to go full gas right off the bat.Don't raise the slide stop screws without twisting the throttle to take the stress off the screws first.
>>29017216Yeah man, sounds like you have a vacuum leak somewhere. >>29017280 also do what this anon says, he's on it.
>>29017216Could be that your carburetors are not syncedBench syncing should be enough, no need to buy the syncing clocks
>>29017237Weird way to go for this thread.Thats the performamce level of a standard beginner bike.
>>29017237>>29017351Its a cool bike too. A Vtwin shaft drive combo is something I wish honda still made. If you want anything close nowadays, you only have moto guzzi, and I am no fan of italian engineering
>>29017491Deauville and Pacific Coast would be the obvious ones.I'm sure everyone in America in the market for a v twin pictured pic in their life.
>>29017216Beloved of dispatch riders came in Nighthawk/Silverwing touring guise too. A turbo was to be had because turbo was cool.
>>29017216sounds like she's running lean as all hell. backing out the mixture screws might get it to idle and rev. there might be so lacquer gumming up the jets still. or there could be a torn diaphragm or something.
>>29017499Uhh.....Im 'Merican and have had so many bikes that I cant remember them all (literally tried, every time I come up with a different number- 37....42...idk). Even worked at a couple motorcylce dealerships. And I have no fucking clue what that thing is.Pretty sure youre another jeet on a shill farm being paid to desteoy this site.Prove me wrong.
>>29017650pretty sure is just a pan European
>>29017650You should get out more ;)
>>29017216Sounds like you are barking up the right tree but I’d like to remind you that motorcycles pretty much always have the wrong spark plugs in them.
>>29017650Honda has so many different bikes throughout their lineup throughout the world there's always a Honda that makes me go "huh? I never saw that one before..."I recently saw two different V4 versions of a similar looking bike to the Pacific Coast irl and I had to do a double take when I saw Honda on the side and I consider myself a Honda motorcycle owner enthusiast. I somewhat agree though, the Pacific Coast is an obscure Honda when it comes to their shaft driven vtwins
>>29017660Honda Pan European is different, that's a V4 the Pacific Coast is a Vtwin
>>29017216>the throttle laggedI haven't looked at the spec sheet but if the CX500 used CV type carburetors then lagging throttle is usually the slide diaphragm rubbers being old and hardened. Replacement is cheap and easy but a tedious job and kind of easy to scrub if you're ham fisted because the rubber is delicate when new.Now, to get your bike running again, you're going to want to rebuild the carburetor back to factory spec and for guidance on that, use a Honda factory service manual, one for a bike as old as yours should be easily found online for free.
>>29018775must have gotten them mixed up.this is where I heard about it from.https://youtu.be/UjvVF_ZGhrg?si=0mDU3uTPsVCaY_gH
>>29017216I have heard the old Honda air-tubes between the carb and the cylinder are pretty crap, they get stiff and leak. That might be your problem.
>>29017216>>29018776>you're going to want to rebuild the carburetor back to factory spec and for guidance on that, use a Honda factory service manual^THIS.Your options are:1. Save yourself months of headache, and take the carb to a pro for rebuilding2. Purchase rebuild kit and attempt it yourselfI'd be willing to bet that the Mixture screw needles, seats and gaskets, that sat for 40 years unmoved, were damaged and idle circuits became blocked as a result.I could be wrong but a rebuild is your best bet, imho.
