Colter
Scoot Member
Live your life building new things.
Posts: 21
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Post by Colter on Jun 1, 2019 23:40:10 GMT -5
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Post by oldgeek on Jun 1, 2019 23:43:38 GMT -5
Thems racing bearings, C4 are looser than the standard C3 bearings, but they will do.
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Colter
Scoot Member
Live your life building new things.
Posts: 21
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Post by Colter on Jun 1, 2019 23:55:52 GMT -5
Thems racing bearings, C4 are looser than the standard C3 bearings, but they will do. Should I do something else? I got them because they're the bearings they recommend for this crankshaft (also Polini) and they come with the seals as well.
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Colter
Scoot Member
Live your life building new things.
Posts: 21
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Post by Colter on Jun 2, 2019 0:02:13 GMT -5
A question about this new carb, what are these two ports for (see picture attached)? The carb I took off didn't have them. Pretty sure the single port next to these two is the oil inlet for the oil pump, but I don't see what roles these two ports play.
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Post by aeroxbud on Jun 2, 2019 6:57:35 GMT -5
Those are for water pipes if your bike has a heating circuit. Just blank them off
I have those bearings in my scooter now. They are ok. Even with only 1500 miles on them I am not going to re-use them. It's just not worth the risk of damaging them when removing from the old crank. Getting an engine failure through reusing old bearings is not worth the risk
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Colter
Scoot Member
Live your life building new things.
Posts: 21
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Post by Colter on Jun 2, 2019 11:43:01 GMT -5
Thanks for the insight on the ports. Further, on blocking them off, would I use some rubber tubing caps, shrink wrap or do I need to pull those nipples and put brass blanks in? I hear all y'alls points on bearings. I thought about that a bit myself too as I was pulling the case apart (i.e. how good is it to have all this stress on these kinds of thoughts). The tools to remove them off the old shaft was more expensive than buying the new ones anyway. When I go to install this shaft, I plan to follow this video. However, I have not disassembled the rear transfer case, it's completely broken down otherwise. Pictures attached. My question is: do we think it's ok to put the thing, as is, in the oven at 200 F. The rear axle case is full of standard motor oil that's used at that temperature. The rest, I figure, is metal or material with tolerable heat limits... But I want to be fairly sure it won't harm it. Any opinions?
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Post by Lucass2T on Jun 2, 2019 11:53:02 GMT -5
You can also use a propane torch. Heat the cases (bearing area) to 110 celsius or 230 fahrenheit. A IR temp gauge is handy in that case. Heating the bearing area for about 10 minutes will do too.
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Colter
Scoot Member
Live your life building new things.
Posts: 21
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Post by Colter on Jun 2, 2019 12:41:14 GMT -5
You can also use a propane torch. Heat the cases (bearing area) to 110 celsius or 230 fahrenheit. A IR temp gauge is handy in that case. Heating the bearing area for about 10 minutes will do too. I have both. Good idea. I would *prefer* to bake it if I can, but this is a great option as well.
I suppose to attach the other side of the case I would have to do this as well? Or will the case installer tool do this smoothly on its own?
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Post by aeroxbud on Jun 2, 2019 14:29:31 GMT -5
I just use a heat gun. It gives a good spread of localised heat. It's much easier when handling the cases too. Just heat the other side when fitting as well. It does not matter which way you fit it. Either bearings on crank, then into cases. Or bearing into cases first. But if you put the bearings into the cases, just be careful not to over heat them when installing the crank.
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Post by aeroxbud on Jun 2, 2019 14:38:44 GMT -5
This is for the Piaggio engine, but not a bad guide.
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Post by oldgeek on Jun 2, 2019 14:53:57 GMT -5
There are many ways to get the job done. Whatever you do, dont put a case containing even a drop of gear oil in the oven! Your wife will never get over it and neither will you! I use a work area with a hole drilled in it for the crank to stick through, which allows the cases to sit level and makes it all much easier to align. I also use a heat gun suspended above the work surface to heat the bearing area up. I also assemble in a different order. First I install the crank into the small case half. Then I lay the large half over the hole I mentioned and install the small case half with the crank into the large half. It is very important as 90GTVert mentioned in his video that you make sure your cases go together like butter prior to you installing the crank. In your picture I can see that you do have the factory trenched cases. Thats what helps these Vinos go! EDIT: Also, if you have motor oil in the gearbox, drain it out and add a decent synthetic gear oil.
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Colter
Scoot Member
Live your life building new things.
Posts: 21
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Post by Colter on Jun 2, 2019 16:04:34 GMT -5
Awesome. This is great info. 1. I have a wooden table I can drill a hole into to lay the case flat. So I'll get that done. 2. I thought it needed a gear oil and I even bought some full synth 75w-140 oil to put into it, but I read somewhere that it wasn't the right stuff to use... Happily put gear oil in a gear box though, seems to make sense... 3. I bought a propane torch head today, but I like the heat gun idea. I have several (I'm an elec/system engineer, so I use them all the time). This checks a lot of boxes so far. I can prep everything for when the bearing arrive. As for this carb: 1. I blew into the ports and figured out its just a 1:1 route. So I picked up some 1/4" rubber tubing and I'll seal these heater ports up that way. 2. I guess the kind of carb I bought is a "PHBN". I've been doing some light reading on it and it seems there are multiple jets on the bottom besides the main jet. I opened up to confirm. It looks like the tuning of this thing can be quite intricate? Does anyone have a good walk through on tuning one of these. I see the 90GVTert BBK walk through has some insight. But, is there anything more detailed for this type of carb? It currently has 90 Main and a 34 Mixture jets installed from factory and I have a 75-98 main jet set to tune with. Is there anything else I need to order?
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Post by willie on Jun 30, 2019 15:19:49 GMT -5
How did the Vino turn out?
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Post by houseoffubar on Jul 3, 2019 21:03:02 GMT -5
I’m also to soon drop a 70cc kit in my Vino. So far it has a $60 ebay pipe, and 3 gram variator weights. The best mod, by far has been going to 3.0x10 tires! It gained about 8mph and somehow lost zero acceleration?!
I got a fairly decent rear shock, but it looks like I will build a whole new front end to get suspension there that is not softer than bunny fur🙄 BTW, loving all the technical info here (my first post) Looking forward to building a few scoots with you all! Eric
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Post by aeroxbud on Jul 6, 2019 7:39:44 GMT -5
I’m also to soon drop a 70cc kit in my Vino. So far it has a $60 ebay pipe, and 3 gram variator weights. The best mod, by far has been going to 3.0x10 tires! It gained about 8mph and somehow lost zero acceleration?! I got a fairly decent rear shock, but it looks like I will build a whole new front end to get suspension there that is not softer than bunny fur🙄 BTW, loving all the technical info here (my first post) Looking forward to building a few scoots with you all! Eric Welcome to the forum Eric. That's a pretty impressive gain for a tyre. I guess it could probably use a gear up kit. Why don't you start a build tread in the build section.
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