Freshman Rider
Currently Offline
Posts: 69 
Likes: 0
Joined: Apr 24, 2016 8:27:05 GMT -5
|
Post by 926am on May 3, 2016 22:19:29 GMT -5
I'm running a #150 main jet in a CVK 32mm carb. Anyone have an idea what size the pilot jet should be?
I'm having tough cold starts, and since it responded so well to the increased main jet, start looking at the idle circuit. Waiting on a set of pilots of diff sizes.
Thx.
|
|
Freshman Rider
Currently Offline
Posts: 69
Likes: 0
Joined: Apr 24, 2016 8:27:05 GMT -5
|
Post by 926am on May 4, 2016 12:00:57 GMT -5
Yes, I am waiting on a new enricher which I hope will act quicker.
Regarding pilit jet: how is a determination made to change? Trial and error, or off idle acceleration? Most of the available information deals w/main jet, not a lot on pilot/idle jets.
|
|
Freshman Rider
Currently Offline
Posts: 69
Likes: 0
Joined: Apr 24, 2016 8:27:05 GMT -5
|
Post by 926am on May 4, 2016 14:54:19 GMT -5
It's a cn250. Complete rebuild (newcrank/piston/head/carb.)
I'm having 2 problems: hard cold starting & over-heating (& faulty gauge temp reading.)
It seems the over-heatingmight have been fixed. I had to jack up the front end & run w/rad cap off. W/o a functioning gauge I'm proceeding w/caution, but it looks like it's no longer melting temp sensors.
Regarding the hard start, I've tried adjusting the idle mix screw, checkd valve adjust, checkd for leaks, ordered new choke (seems to work slowly.)
I have another bike (suzuki gs 500) & when I ordered new main jets they also sentnew pilots. Made me wonder if there's a formula (for pilots.)
Cf moto v3 has stock intake, 32mm cvk carb, #150 main jet, & straight through muffler.
|
|
Freshman Rider
Currently Offline
Posts: 69
Likes: 0
Joined: Apr 24, 2016 8:27:05 GMT -5
|
Post by 926am on May 4, 2016 18:49:38 GMT -5
Thanks for the tips. The new carb enricher didn't have the same connections as the old one, so I put the old one back on. I'll try testing it like you described.
The muffler was more a matter of money than performance. Not my first choice, but a savings of $200.
I ordered a set of pilot jets, trying to guess which would be the best to try first (they're due in next week.)
I might try drilling out the pilot jet...
|
|
Freshman Rider
Currently Offline
Posts: 69
Likes: 0
Joined: Apr 24, 2016 8:27:05 GMT -5
|
Post by 926am on May 13, 2016 14:30:22 GMT -5
Question on the jetting: info online says to do the main jet first, then the pilot. But, I'm getting lean indications at idle and at speeds below 20 mph (1/2 throttle) which indicate the pilot jet. (Also, I cleaned out all passage-ways w/cleaner and guitar string, just in case.) When I had the #150 jet installed I noticed a big difference at idle, (sounded deep) but it didn't ride well and the plug was black (serious bogging.) Now I have a #135 main and #42 idle, and I added a baffle to the muffler, and it has good pick-up.
So do I keep working the pilot circuit, or try the main?
Symptoms are hard cold starting, and a white/ash plug. (I don't see any point in taking her onto the highway until I get this resolved.)
Thanks for your help. I feel like I'm close to finishing this project. (worse case scenario I install a stock muffler, but not yet!)
|
|
Freshman Rider
Currently Offline
Posts: 69
Likes: 0
Joined: Apr 24, 2016 8:27:05 GMT -5
|
Post by 926am on May 16, 2016 19:13:22 GMT -5
Yeah, I tried to adjust the needle but it doesn't allow for adjustment. Bumped up the pilot jet to #45, but still hard starts. I'm going to to try a colder plug, & possibly 'genuine Honda' enricher. Starts great on ether!
A baffle is a bolt-in piece that adds restriction to the muffler. Since its straight-through, I figured maybe it needed a little back pressure.
Thanks for the tip on the Briggs/Stratton, will keep that in mind.
Can't wait to get this thing running right!
|
|
