HPI VS stock

[evaneyeball]

I took my carb apart and I have a 168 main and a 55 pilot. I will change the pilot to a 48 pilot and I dont have a 180 main and the biggest I have is a 195 main and then down to a 172 main and 170 main. I had the 195 main in and a 50 pilot in before the complete motor rebuild then arlen told me to put a 170 in and a 55 I did that and was bogging in the top end so I threw the 168in and left the pilot. In short should j put the 195 main back in and the 48 pilot or should I put a 172 in because I cant get a jet kit in time for the winchester ride.

[desertR]

Buy a 180, 178, 175, main and whatever else you need, there cheap, when compared to what the cost of doing it again is.
desertR

[The norm]

That bog was from a lean condition most likely. You can order a 180 main and definitely have it to you before the meet. If not I am sure I can give you the correct jet when I see you down there.

[evaneyeball]

I'll see if I can get some jets from arlen and if not then I'll see if one stop has them. Because the jet kits for a cr500 carb aren't that cheap.

[The norm]

It doesn't matter which bike the carb came from. Keihin pj/pwk jets are the same. You need a hexagon shaped keihin jet in 180, 178, 175, 172. They are 3-4 bucks each. A CR500 carb is usually a keihin 38pj which is the same carburetor that came on some CR250's. I personally prefer keihin pwk quad vent carbs to pj's. I hate adjusting idle with the choke knob!
Loren

[evaneyeball]

I hate this carb too but it's working now and I will get a better one soon but I have a 172 and am getting some on friday from arlen a 180 a 178 and a 175

[broken1]

Just did a quick search & found a place that works on bikes called TNT motorsports in McMinnville. They might have main jets in stock. You guys have an awesome Napa there too, maybe they have something.

[evaneyeball]

The napa in newberg you practically have to go get it from the back yourself lol. And TNT is sketchy but can give them a try but if all else fails LED has the jets I need

[evaneyeball]

I finally got time to work on it and It started first kick and i am extremely surprised and throttle response with the new reeds is awesome.  I did get it to idle with my crappy carb and i rerouted my throttle cable so it dosent change the idle when I turn left and right.

[The norm]

Hopefully you did several heat cycles before revving it up! Glad it running again. As far as your carb goes, keep an eye out for a 99-00 CR250 38mm airstriker used on Ebay. I picked one up for $95 shipped. It's the same pwk airstriker that everyone is using for a fraction of the cost. Swap out the dirtbike needle with a dgh, dgj, or whatever you want. Then jet it for your engine.
Loren

[evaneyeball]

I did jet it but I couldn't get my hands on a 175 so I went down to a 172 and I think a 175 would be better. And i put a 50 pilot in and it started without choke but there is no bog so I'm not worried I do want to go a little fatter on my main because there is barely a deep noise when I revv it up, I'm confusing myself typing this and cant find anyway to make it better. I did do 2 heat cycles before revving it up because I only put in new gaskets and a wrist pin bearing in

[The norm]

Keep in mind a bog is usually from a lean condition. When you have a rich condition your engine will usually stutter or break up when trying to rev. If it is grossly rich it will spit and sputter like it has a miss. If you hear your engine being real zingy like a cr85 or something you are still lean.
Loren

[broken1]

I did jet it but I couldn't get my hands on a 175 so I went down to a 172 and I think a 175 would be better.

Gotta be honest here, I don't understand why you'd only go up one jet size after burning up your top end with a 170 main. As suggested start with a 180, if you can't source the jets locally order them from somewhere so you have them on hand. Not having an assortment of main's, pilot's & needles makes it impossible to properly tune a carb.

[evaneyeball]

I went up 2 jets and I am only missing a 175. And I am ordering a 175. And i never got an answer on if jetting can cause detonation because to me it looks like I put the most strain on the electrical and then it couldn't even go up the simplest of hills and dont see how jetting was a part of that. But yes my jetting was lean but it did not detonate once before that hill. And now that I think of it one of my friends has a video of that hill you cant really hear it but right at the top it does it. When he sends it to me the audio is jacked up so he posted it on instagram he is 515ryguy on Instagram. Sorry I didnt think of it earlier

[The norm]

Yes jetting will cause detonation! Electrical will not! A bad cdi will cause it to cut out or not run at all. In the end Evan this is your engine and you can run whatever jetting you want. People who have many years of experience have been trying to kindly tell you that your going to burn your piston again if you choose to run a lean condition. I don't want to scold you like a child, but dude LISTEN! Start out at 180/48 and work from there.  You already tried a 50 pilot and you stated that it started without the choke. That means you should drop to a 48! If you go out and ride your R with a 172 main you are rolling the dice unless you prove that it only needs a 172. That is why you start rich and work your way down. I have 2 stock cylinder R's with porting running 48/178 and my boys can run banshee hill over and over until they are bored and they have not burned up their engines.
But like I said this is your R do with it what you will. Keep in mind that a ton of experience is telling you that you are destined for piston failure at your current jetting.
Loren