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Re: Finally The CB200 Begins - Silver Bullet - New Pictures
so here are the pictures i promised... i took them yesterday (before putting the UNI pods on), so i guess you'll have to wait until next time to see them.
still having major idle issues (it doesn't idle)... and with the CL pipes the left side (the shorter pipe) has more pressure and warms up a lot faster (thinking its running leaner?)? and the right side (the longer pipe) has less pressure and seams to possibly be running richer (the plug only after a few start ups is already pretty BLACK <a lot more compared to the other>)
any ideas would be awesome on either of these issues.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
Did you upjet your carb?! When you put in open air filters and free flow exhausts, you need to upjet. If not, you may have serious valve problems. I've heard that there are chances of the valve frying off.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
really? so i cant just make the mixture a little richer? i mean i know upjet is fairly common with these mods but it seems to still be running rich? i havnt even had the chance to ride it with all of this on... im still trying to work out all the bugs. once i get it running i think ill know for sure if i need larger jets, which is no biggy, i have to get it tuned soon anyways.
question on the carbs though.... and the faster this can be answered the better (keep in mind when purchasing this bike i had never touched a carb in my life).
where the main jet comes up through the bottom of the carb and into the chamber... how much of the jet should be showing? my jet doesn't seem to screw in all the way (threads still show on the underside).... ALSO... is there suppost to be a o-ring on the end of the jet in chamber (where the needle comes down)... i have these tiny extra o-rings from each of my carb kits but im not sure where they go (im guessing here)... however the jets dont seem to come up quit far enough to set on the end of the jet securely.
please help! i would really like to get the thing up and running tomorrow so i can atleast see where i stand as far as tuning goes (bigger jets or whatever i may need)
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
Ok guys... money has been short (get payed tomorrow)... so until then I decided to go for a ride and snap a few photos, plus it gave me the opportunity to get more use to the bike. Runs ok, not great, I need to get a bigger jet and really spend some time tuning it.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
hey, nice work on that bike. it looks great.
about the carbs...maybe post a picture or two re: the fitting of the jets. are they mikuni or keihin? I've never seen carbs on a 200 but on my 500 the slow jets screwed in and the mains pressed in with an o-ring. Im just thinking that with some photos someone could probably point you in the right direction. is the needle position adjustable on those carbs?
one thing to keep in mind...tuning the carbs is the LAST thing you are really going to want to mess with. especially changing the jet size. even with pods vs. stock airbox or filter, you should be able to get the bike to start, idle, and run pretty well. go back to the basics before experimenting too much with the carbs. check compression on each cylinder, check for air leaks, quality of the spark you are getting at each cylinder, etc.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
mikuni carbs... both jets screw in. ive figured out since then that they are sitting correctly. the needles are adjustable (5 ways), i have them set in the center slot right now.
the bike starts great, idle i still need to tinker with (ALOT), running is decent... HOWEVER and this I just recently found out... the cylinders didn't seem to be burning to there farthest potential... they get good spark and no leaks from what i can tell...the reason i found out is low compression results. im looking at about 120 on each cylinder. of course this was on a cold bike and i have yet to check the valves. i may be looking at new rings etc etc. all in all, the plugs get really sooty after putting around 25 miles on the bike. no big deal, i just need to start my search for rings and seals.
other than that... once i get the new front tire in and have everything off the front of the bike, im going to lower it a bit, drop the headlight and gauges a bit and chop the front fender. i also gotta do something with the brake light soon... its HUGE.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
Tune cb200 carbs - I am assuming all parts are in good working order prior to the tune.
I have this exact model of cb200, but in green color. Sweet little bike. This bike tend to run rich on stock. This is how I tuned the carbs so it run smooth and you don't see black goop on the spark plugs. Use stock air filter while doing this tune and then you can migrate to pods if you'd like - you might see some difference, I didn't.
Set your air screw to 1.25 turn out for both carbs.
Set your idle screw to 2.5 - 2.75 turn out - or until your tach shows 1200 +-100 rpm.
At this point you can leave it alone and call it good. But this isn't tuned yet, the bike will ride well, but not good.
Now turn your right air screw left or right, toward the direction that increases or makes your bike rev higher (should be less than 1/2 turn or so), your tach should shoot up.
Do the same thing for the left air screw (you might not see any change)
Once your bike is revving really high and the rpm is way above 1200rpm, you next turn your idle screw out, turn both of them on the carbs at small increments at the same time, until the tach go down to 1200 +-100rpm.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
just curious tuyvux whats your compression look like on your cylinders? anyone else... from what i hear it should be around 150-160lbs
i should really work on that first or all of this tuning is in vain really. it's all ok though, i need to save up some money anyways to get it tagged and titled and get my MC license... once all that is done im going to save on the build.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
904cafe said:
just curious tuyvux whats your compression look like on your cylinders? anyone else... from what i hear it should be around 150-160lbs
i should really work on that first or all of this tuning is in vain really. it's all ok though, i need to save up some money anyways to get it tagged and titled and get my MC license... once all that is done im going to save on the build.
When I purchased the bike, it was in pieces, literally, only the frame and two wheels were attached. The engine was in several boxes. All I had to do was inspect and put the parts together, several times! Each time, missing a piece of this and that. I chalk it all up to learning experience.
Engine. I replaced with new rings (ebay) (kept the pistons - look good), honed the cyclinder (I purchased a brake honer for less than $8 at Schucks) and lapped the valves (lapping compound less than $10). You'll also need to buy spring compressor ($24), the one from Sears worked best for me. You can do this on a small budget. Rings will cost you the most.
Compression - from memory, it was around 145ish.
You should do a compression check first as it will let you know where you stand. Like you said, you can do all other stuff, but if you have low compression, you won't be getting anywhere fast.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
luckily i work at an Acura dealership and one of the guys here has been building B series and H series motors for around a decade now. he has all the tools needed and the abilities. im prob going to bring the motor into the shop and have him work on it for me, teaching me as we go. i just wish i knew what size rings i needed ahead of time, waiting then finding a set according to which ones i need is going to take up a lot of time.
like i said, title and tag first, then pay for my MC class and license, then save and find time to rebuild... thats the order im prob going to go in. until then ill just continue to just work on the cosmetics.
Re: Finally The CB200 Begins - Silver Bullet - New Pictures
finally got the title issue squared away. all i needed was a affidavit signed by the seller and notarized, along with a notarized bill of sale. tax office got me in and out with a tag (and title in the mail) and registration.
bike is running super lean due to several things... low compression, filters and straight pipe. so its time to rebuild it. just purchased a full gasket kit for it and i'll be disassembling the motor here soon to hone it and figure out which size rings im going to need. while i have the motor apart i am going to have a go at the cosmetic factors of it as well. from where i stand right now it all depends on time and money (doesn't it always?).
ill be taking pictures of the tear down (mainly for myself, so i can figure out what goes where later) so ill post a few here and there. im going to attempt to do as much of it as i can (though i have NEVER done this). i would like to be able to say in the end that I did it.
Re: CB200 Motor Rebuild - Silver Bullet - New Pictures
Ok guys... sorry for the delay. I have been working on the bike whenever I get a chance, just havn't had time to post pictures until now. I have the motor out of the bike now, with the head and cylinder block off and the pistons out. Im sending the block off to get the walls honed and the head off to get the valves set.
I did run into one major problem which you will see in the last picture... It has made me dig deeper into the motor than I really intended to but I guess I'll learn more than I thought. I have yet to find out what it exactly is but I have my guesses.
Very dirty frame... don't worry some Oven Off oven cleaner took care of that!
And this is my reason for digging into the very depths of the motor. Upon taking off one of the sidecovers with an impact hammer, I hear a metal tinging and when I go to flip the motor on it's other side, this little guy pops out... half a gear!
Like I said I have the pistons out and what not now, just havn't had time to snap more photos. Today I'm going to remover the lower case cover and figure out which gear that is. I'll be posting up soon looking for some sort of gear.
Dropped the head and cylinder off yesterday, they're going to hot tanks it, hone, and lap the valves.
I just got a call about an hours ago telling me my oil filter/clutch tool came in today at the local shop up the street. I'm going to go snag that here in a bit and get that lower case off. I'll keep everyone posted, since I'm going to need some sort of gear...
Until then here is a picture I found from when I first got the bike.
Ok guys, sorry I havn't posted in a bit. School started back up for me last week and I'm still adjusting to things.
I ended up getting the lower part of the case off and pulled all the shafts out (keeping all the gears on so to not mess with the clips etc on the shafts). Searched high and low for the other half of the gear and couldn't find it anywhere. Looked for it on the shafts thinking it may still be jammed up. ALL of my gears on both shafts and the kick shaft are there. There isn't a single gear missing or broken in that entire bike, so where that piece came from I don't know.
Anyways. So I got the head and block off the the local shop and got it back a few days ago. Im going to order some new pistons, rings and pins here in the next few days and while I wait on them to come from teh UK I will be repainting the entire motor.
I already attempted to paint one of the sidecovers and it didn't come out so hot. I used a wire wheel to clean a lot of the old garbage off the motor and covers. In doing so I left some really coarse lines in a lot of the metal so I am having to go back over the motor with fine sand paper. Painting before using the fine sand paper I could still see a lot of the coarse scratches through the paint. To help with this I picked up some high temp engine primer to throw on there before the actual silver.
As you can tell it's slowly coming along... now it's just reassembly and waiting on parts.
Any tips on the engine paint job would be AWESOME!
I love that gas tank! Good work..trust me you'll learn alot. my first was a cb350. and its sooooo rewarding to get everything running right yourself.
Goodluck
wow it's been a long time since I have posted! I have been slammed with school work and only have a few days out of each month to even touch or look at the bike... my daily work on the bike ended long ago and it sucks, i really wish i had more time. to update, the motor is still in pieces however I have painted it all and its looking pretty good. i have a few pictures i took on my phone ill post (when i have time, haha). it sucks because by the time i get it all together it will be cold. (which isn't really cold to any of you up north [florida weather]).
33 degrees this morning on my way to work, not cold yet, just a little chilly...
Read up on a couple projects, it will get you motivated again. Besides, winter months are the best building months.
Now, get back to work!
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