mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 9:18:15 GMT -5
So here is a video showing what my scoot is doing, I installed a Tach to show the rpm and such. I have gotten it running, bit it's running pretty badly. Any help or advice would be appreciated, if you can help me get it running I have some chick-fa-la coupons on deck along with some other stuff!
Thanks!
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 11:13:07 GMT -5
This is part 2, valve lash. it was way off..like super way off. like maybe .007 on ex and int. rushing the other night. dont rush kids. so it idles and sounds ok at idle. having surging and hesitation...
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Post by jloi on Nov 9, 2019 11:16:43 GMT -5
sorry I can't offer any help but I'm wondering where you got your tach ? could you give me a link?
good vid btw - help should arrive soon from people who know things
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 11:25:59 GMT -5
sorry I can't offer any help but I'm wondering where you got your tach ? could you give me a link? good vid btw - help should arrive soon from people who know things This is it on amazon. it was like under 12 bucks and took 5 minutes to install. read the reviews to setup for your scoot, the correct setting is 1P1R, not 1P2R firing pattern.
runleader tach |
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Post by scooterted on Nov 9, 2019 11:41:26 GMT -5
Thats the same tach i use. I only use it for tuning. I tape it to the handlebars somewhere when i need it.
I usually go a little tighter with the valve lash. .0025 with the intake and .003 for the exhaust. But what you have is probably fine.
That surging is interesting. Will it run faster than that or does it hit a brick wall?
Usually, i equate surging with running lean. But since youve for a 35 with the mix screw all the way in (you're gonna need smaller pilot jets) and a 90mj i wouldnt expect you to be lean. What does youre spark plug look like? And how bout the spark plug gap?
Have you tried messing with needle position?
Edit: And perhaps most importantly. Engines often act different under load. Hows that? And hows the float position? Have you sprayed the carb out? Sometimes even new carbs have been found dirty.
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 11:47:35 GMT -5
Thats the same tach i use. I only use it for tuning. I tape it to the handlebars somewhere when i need it. I usually go a little tighter with the valve lash. .0025 with the intake and .003 for the exhaust. But what you have is probably fine. That surging is interesting. Will it run faster than that or does it hit a brick wall? Usually, i equate surging with running lean. But since youve for a 35 with the mix screw all the way in (you're gonna need smaller pilot jets) and a 90mj i wouldnt expect you to be lean. What does youre spark plug look like? And how bout the spark plug gap? Have you tried messing with needle position? Edit: And perhaps most importantly. Engines often act different under load. Hows that? And hows the float position? Have you sprayed the carb out? Sometimes even new carbs have been found dirty. no it hits a brick wall. the mix screw is the exposed mix screw on the sealed carb that came with the bike stock, when i removed the cap it has a wierd bolt head, looks like it would be awkward to adjust. it is in the original setting from the factory. the plug is a brand new plug should already be pregapped, it looks blackish so it might be too rich. im going to remount the other aftermarket carb and put the 35 and 90 into that carb and see what happens. |
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Post by scooterted on Nov 9, 2019 11:58:38 GMT -5
It definitely could be so rich it hits a brick wall.
Do you have different jets to try?
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 12:58:37 GMT -5
It definitely could be so rich it hits a brick wall. Do you have different jets to try? i dont have a pilot jet lower then 32, i have some different main jets i dont know if going below 90 is a good idea. something is very off. pretty perplexed right now. |
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Post by scooterted on Nov 9, 2019 14:31:46 GMT -5
It definitely could be so rich it hits a brick wall. Do you have different jets to try? i dont have a pilot jet lower then 32, i have some different main jets i dont know if going below 90 is a good idea. something is very off. pretty perplexed right now. I would try what you have. You dont have to try it long or go racing down the road. A cheap janky trick temporarily to richen up mixture is to cover up part of the inlet to the aibox with tape. |
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 16:09:59 GMT -5
i dont have a pilot jet lower then 32, i have some different main jets i dont know if going below 90 is a good idea. something is very off. pretty perplexed right now. I would try what you have. You dont have to try it long or go racing down the road. A cheap janky trick temporarily to richen up mixture is to cover up part of the inlet to the aibox with tape. Here my latest terrible Video. I switched back to the cone air intake and I've made some progress, it idles real well but just has no power at take off, I jumped to a 98 main jet, and might drop down to a 96, it didn't like the 92 very much. Any ideas please let me know. I'm going to go out once again and down jet from this 98 to a 96. |
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Post by scooterted on Nov 9, 2019 16:36:47 GMT -5
If you havent tried it yet. Try changing the needle position, either by moving the clip of an adjustable needle, or by sticking a washer or two under the clip of a non adjustable needle. See if things change.
Do any of your jets make a change in the way it acts? Where did you get them? Im starting to wonder if youve got jets that are not actually sized in the way they are labeled.
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 17:08:00 GMT -5
If you havent tried it yet. Try changing the needle position, either by moving the clip of an adjustable needle, or by sticking a washer or two under the clip of a non adjustable needle. See if things change. Do any of your jets make a change in the way it acts? Where did you get them? Im starting to wonder if youve got jets that are not actually sized in the way they are labeled. The jets are galaxil from Amazon, the reviews seem to suggest that they are fine. I have gone through yeah basically it gets up to 6600 rpm's but has no ass, and starts to bog and misbehave past 6800-7000 rpms. I dropped the needle once already, I need to try and move it up, I don't know if its lean or rich, I'd say with low power and bogging maybe its too rich. It's not pinging or misfiring as far as I can tell. It idles nice but I know that the pilot also has to do with takeoff and powerband from idle to 25% then the main starts to take over. Can a too low of a pilot not allow the main jet to be able to do its job? Carb tuning is some serious shit. Thanks for your help 😁 |
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Post by scooterted on Nov 9, 2019 17:47:49 GMT -5
I have the same setup (i figured you did too. Im wondering if maybe its not such a perfect kit, especially in the 90s range. Ill have more data on that in a couple days.
I would not expect the pilot and main jets to have much effect on each other.
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Post by scooterted on Nov 9, 2019 17:51:29 GMT -5
This ia an excellent graphic that represents how differnt parts of the carb relate to one another.  |
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 9, 2019 18:15:46 GMT -5
This ia an excellent graphic that represents how differnt parts of the carb relate to one another. I can't emphasize how important needle position is. I moved my clip up and immediately had huge gains, rode around and was hitting 25 mph+. 67-6800 rpms, nothing over 8000 rpms. It needs some more tuning via main jetting, but I learned that I'm heading in the right direction. |
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