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Post by 90GTVert on Mar 18, 2019 16:01:10 GMT -5
I would try larger if it bogs. If that doesn't work, then go smaller.
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Post by scootnewb on Mar 18, 2019 16:33:57 GMT -5
Cool. That makes sense. I guess I thought it would backfire if it was lean so I thought maybe there was too much fuel causing it to bog. I'll see how it is with 115. It's getting exciting now!
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Post by scootnewb on Mar 18, 2019 19:09:02 GMT -5
Earlier today before my last post I went to the local shop. When I picked up the Grom parts on Saturday there were 10 pieces of Yamaha items mixed in so I went there today to return them and ask for a quote on a crab tune. They said: We don't work on Chinese motorcycles. I said: How can a billion Chinese people be wrong? They said: Sorry I said: But the carb isn't made in China (it is but says Japan on the side) They said: Sorry It was fun to go there and see some of the bikes and dudes on the phone speaking with their wives. They're going over the prices of everything, making sure it's okay. Imagine having to check with someone before you buy something? I guess dropping 15k on a KTM MX-er requires permission. I have 99 problems and that isn't one.
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Post by 90GTVert on Mar 18, 2019 21:10:32 GMT -5
Many motorcycle shops want nothing to do with Chinese stuff. Can't really blame them. Parts can be weird and they are cheap enough that your repairs can easily be half of what the bike was new if it's beyond anything really simple. Then if it has one of it's usual Chinese issues just after it leaves your shop, you're the one the customer will blame. A lot of people don't even realize what they have till after you work on it. I had a guy that needed work on a Chinese retro scooter. $800 new. I got it done and then he complained that all of the seams between body panels weren't even and had larger gaps than he thought they should have. The thing was better when I gave it back than when I got it, but somehow none of that caught his eye till he wanted to look it over to see if I did good work. It's so common to have broken tabs and stuff like that right out of the crate. Even minor stuff like that gets frustrating. Then imagine he goes and tells someone asking about a motorcycle shop that a shop did a poor job with his body work and they don't understand that he had a cheap Chinese scooter. Get a bad name for nothing.
Just more of a reason that I think anyone buying Chinese either needs to be prepared to work on it themselves or find a shop willing to work on it BEFORE buying.
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Post by 2stroked on Mar 18, 2019 22:07:05 GMT -5
Many motorcycle shops want nothing to do with Chinese stuff. Can't really blame them. Parts can be weird and they are cheap enough that your repairs can easily be half of what the bike was new if it's beyond anything really simple. Then if it has one of it's usual Chinese issues just after it leaves your shop, you're the one the customer will blame. A lot of people don't even realize what they have till after you work on it. I had a guy that needed work on a Chinese retro scooter. $800 new. I got it done and then he complained that all of the seams between body panels weren't even and had larger gaps than he thought they should have. The thing was better when I gave it back than when I got it, but somehow none of that caught his eye till he wanted to look it over to see if I did good work. It's so common to have broken tabs and stuff like that right out of the crate. Even minor stuff like that gets frustrating. Then imagine he goes and tells someone asking about a motorcycle shop that a shop did a poor job with his body work and they don't understand that he had a cheap Chinese scooter. Get a bad name for nothing. Just more of a reason that I think anyone buying Chinese either needs to be prepared to work on it themselves or find a shop willing to work on it BEFORE buying. Good Lord this resonates so hard. There is SO much truth in this one comment. Anymore it is just self preservation for shops to refuse to work on Chinese bikes. Negative word of mouth overrides positive publicity. Every damn time.. OP mentioned QC and I nearly.spat my soda against st the screen. Chinese bikes hardly ever have any QC. Ten minutes reading here gives lots of evidence to that.
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Post by scootnewb on Mar 18, 2019 22:15:32 GMT -5
Oh man, the plastic on my ATM 50 was horrible. This stuff seems a little better and there's plenty of Grom plastic out there in case I need new panels.
I understand why the shop takes that stance and your experience with harsh and unreasonable/unknowledgeable "customers" is all too familiar. It was rampant among the gaming console/PC/Mac repairs/mods biz.
I am willing to work on it and knew I'd have to. I planned on leaving it stock cept for the 17t sprocket. I did my homework before purchasing it and I got all the sturdier replacement parts that usually break on these. But I didn't plan on having to get a new carb and deleting the emissions and air-box so soon. Air fuel mixture is my weakness.
Ugh, now I'm paranoid about the carb and getting it running right. I'm hoping the 115 jet will solve the bogging. The reviews on the carb kit I ordered said it was jetted fine out of the box (95) others said 105 or 110. I'm dumb when it comes to carb tuning. I understand how it should work but I can never identify what it needs because some of the symptoms for rich and lean are the same. I think if someone were to tune one and go over it in front of me I might get it.
Oh. I put the sticker for the scooter on this too. I drove by the police a couple of times and they didn't look twice. It looks like this is gonna work until I get the certificate of origin and get a plate.
I can't wait for scooter week.
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Post by 90GTVert on Mar 19, 2019 7:13:33 GMT -5
Go to the carburetor section here. There's quite a bit of info. www.49ccscoot.com/faq/faq.htmlI think if you go through a trial and error main jet selection process with a jet kit, you'll take a lot of the headache out of carb tuning. That has been the easiest way for me to deal with them, short of a wideband. It's laid out in detail in the carb tuning article that you'll see in that link. A lot of times getting the main jet figured out and adjusting the idle mixture will get it working OK. The part throttle tuning can get really frustrating to everyone, but 4Ts usually aren't terrible there.
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Post by scootnewb on Mar 19, 2019 10:17:52 GMT -5
I am reading that crab tuning guide again. I put in the 115 and it still bogs whenever I try to go more than 1/2 throttle. On the bright side, it seems to run better up up to 1/2 throttle. But I don't see how. I can also change the jet without removing the carb from the bike. I have no choice. That silicone gas line is on crazy tight. I'm gonna try 120 as soon as the gas drains from the bowl. 120 seems worse. After crying for a little while, I put in the 105 to see what would happen. Now I can go past half throttle but the last final 7/8th turn of the throttle is bogs/cuts out. As usual the law of air fuel mixture never applies to anything I've owned. Or perhaps using the word 'bogs' wasn't the right way to describe what it was doing. I think this air filter is super restrictive. I am going to try a 100 next. SOON 100 main worked! Went to the store with the backpack and picked up some treats.
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Post by scootnewb on Mar 19, 2019 14:37:31 GMT -5
Okay now time for stage 2 Hayabusa motor.
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Post by scootnewb on Jun 10, 2019 23:09:57 GMT -5
It took a while but it is finally (close to) done and coming in at half the cost of the TGB. I bet it is much faster than the TGB. UPDATE: Added some things you can't see and got the exhaust mounted properly.
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Post by scootnewb on Jun 25, 2019 17:05:43 GMT -5
More goodies.
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Post by aeroxbud on Jun 26, 2019 15:08:49 GMT -5
That swing arm looks nice 👍
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Post by scootnewb on Jun 26, 2019 17:04:47 GMT -5
Thanks. It is almost a direct fit it wasn't very expensive and it didn't have a bunch of weird loops on it. I'm hoping to have it all installed this weekend.
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Post by scootnewb on Jul 2, 2019 19:48:48 GMT -5
It is close. I finally got the hang of tuning the carb... Well sort of and I didn't put in the front bearings. A little drilling on the oil cooler bracket to fit it up nice then I can get some decent plastic, brakes, tires and shocks. But I think I am going to take a small break on adding things and ride it a bit to see what it needs.
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Post by scootnewb on Jul 2, 2019 20:16:01 GMT -5
BTW, I am feeling more confident about my wrenching. I may bring that ATM 50 I had so many problems with back from the dead. I think I could remove everything and paint the frame and put it back together with some new parts. I'm just not sure if it is worth the time and money though. This place is where I started learning how to wrench. Too bad you don't have a Grom clone section. edit
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