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Post by pinkscoot on Feb 28, 2018 21:42:40 GMT -5
Thanks, it weighs enough. Its going to be a great scoot to go exploring the mountains.
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Post by pinkscoot on Apr 17, 2018 8:31:56 GMT -5
I got the BV250 back on the lift this weekend after getting other scoots running and ready for the season. I got the carb on and all of the plumbing sorted. I went to hook the air box up and still no luck with the connection so off to Lowes plumbing department. I picked up a rubber sleeve for putting PVC together and with some cutting got the connection. I filled the coolant and with some starter fluid I got it to start and run. It seems to run well and I was able to plead the coolant. I then called it a day.
Yesterday after work I went into the CVT. The Variator seems to be missing a few pieces according to the parts diagram, I'm thinking of replacing it anyway with a multivar. I got to the clutch and it was stuck on and took a three prong puller to het it off. I then played with the shaft a little and it had play sideways, probably a few millimeters. I looked at the bearing in the gear box and its looked like some leakage. I'll open the gear box today and see what kind of shape its in.
I then went to the front of the bike and pulled the headset, it needs serious cleaning and restoring. I checked the speedometer cable and its broken, fourth scooter in a row with a bad speedometer. I know they are inaccurate but they at least give you a clue. I'll get a new cable on order as soon as I see what the gear box needs. My next few weeks at work are pretty normal so I hope to get the parts in quick so I can be done with this and ride it.
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Post by pinkscoot on Jun 16, 2018 14:36:46 GMT -5
I finally got it on the road. Got the new speedo cable finally. I added a exhaust down pipe with a bung for the Malossi A/F meter O2 sensor. Got it tuned in at idle did a quick up and down the street but no Luck at WOT its just too short of a street. I went to put the mirrors I had on and the holes were stripped. Tried a helocoil, no luck. I then investigated and Piaggio is smart and those mount into the U clamp for the Master cylinder $14 later new ones were on the way with another order I had waiting. Got them on and mirrors and was ready for a final inspection by the Theft and Licensing bureau. Put a trailer hitch on the van and loaded it on the trailer and off I went the next morning. I got there and found out that when the Title people did the title they did me a favor and didn't mark it inoperable. I just needed to take it to an inspection station. It passed fine. I got plates the Friday and drove it around today before work. This thing is a beast. It pulls to 50 indicated in no time at all. Brakes are great. The 16" tires eat potholes for lunch. It was running a little lean off throttle, I adjusted it and its great. I'm ordering new Variator slides and DR. Pulley sliders as well as a new Malossi belt to freshen the CVT. It tends to run hot but they all do. The water pump works, fan works, its a runner. Tomorrow I have more time for work and will venture farther from home and see how it does. It still needs a wind screen but I have a few leads and ideas on that. Here it is at work:
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Post by pinkscoot on Jun 17, 2018 14:27:33 GMT -5
When I got home yesterday after a nice ride home I found my new fuel line sprung a leak and was pouring on the hot exhaust. Turned off the engine and fixed the problem. It had been running a little lean at idle so I richened it up. It was also lean at 1/3 throttle so I tried the washer under the needle trick. This morning I adjusted the Tire pressure. I guess I didn't do this when I installed them because they were way high. No wonder it rolled so smoothly. I topped of the coolant and tightened some screws.
The ride this morning was nice, I got it up to 65 and it ran really smooth. At idle there are vibrations that may be from the Urethane silent block or the rollers that are old. The engine was running rich from 1/3 throttle to full throttle so I guess the washer was too much. Idle is also way rich now. When I accelerate its a little rough until about 5000rpm she smooth's right out. I'll order Sliders, guides and a new belt tomorrow and I hope that all goes away. Its nice having the wind on me up to about 55 but after that I'm looking for a wind shield. I'll clean the old beat up one and put it on to see if I like it and then goe from there about a new one.
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Post by pinkscoot on Jun 23, 2018 16:49:32 GMT -5
Got the new belt and sliders installed. I found the reason for the vibration, I had cracked a fin and decided to balance with one on the other side: When I first pulled it i had that tool but forgot I had it. I went to order one with the new drive face and saw the picture and went Duhh. That was the problem, still a small vibration but nothing bad, probably the silent block. It was a little smoother riding but it still was straining a little to get going. The new Malossi belt was the same size as the old Piaggio belt so when I put it on it was high on the variator and down on the clutch. I was done for the day so I didn't go further without a plan. So I thought on it last night and it hit me. Of course it was straining to start moving I was starting in second or maybe third gear. It needed a bigger drive boss or spacers. I read Niz's post on his Hillbilly lathe and decided to make my own spacers. This morning I pulled the CVT cover, not easy, pulled some plastics removed the air box and pulled all the bolts. The belt was about 1/4 way up the variator and 1/2" down the clutch, that wouldn't do it. I pulled the drive face off and saw the belt was about 2 1/2 mm bigger: took dimensions and a washer that rides behind the ramp plate and off to Ace. There I found machine spacers, they were 1mm thick and the inside was just a little smaller that the shaft. I also found washers that were the size of the shaft but bigger than the boss. I got a bolt and nut to make a hillbilly lathe and headed home. The machine spacers were just a little smaller that the shaft but a perfect match to the drive face. I took the dremel and slowly made the spacers a larger ID: One concern I had was whether the belt would have full travel on the variator with the shims so I put the faces together without spacers and put the belt in and got this: Which explains this groove in the case at the variator: There isn't much room for error here: When I put the variator together with the 2 shims it was perfectly at the top of the variator so that problem was solved. It also explained the belt thread I found in the clutch when I cleaned it. I think this was a design flaw with this variator on this model, when I looked at the parts diagram for this year the drive boss number was replaced with another number. On later years its all sold as one unit no separate boss. With the 2 shims in I got this with the belt on: That looked good so I put it back together and started it and it was one noisy puppy. I pulled the CVT cover and found that the drive face hit the air deflector: Off it came, next time I'm in there I'll sand the fins down on the drive face to get clearance. The belt was still not perfect so I tried a third spacer. Closed it up, started it again and reopened it and found the belt out past the clutch edge and way to close to the case: I didn't want to cut into the case because it was a little thin and the 2 shims got me everything I needed so I went back to 2 shims. I put it back together and took it for a ride. Problem solved, it pulls away just like it should and shifts up nicely. I still had the needle up on a washer and it was too rich so that came out. I then used the A/F meter to tune in the idle and it purred like a kitten. I think of it as cheating using the meter and then I think of the guess work with the other options. I'll stay with this and try to put bungs on my other two four pokes. I took it for another nice long ride and enjoyed the power and smoothness of the shifts. I now I only have one scoot in the garage that doesn't run, the vintage Vespa. The Predator is running but not well so it will get taken apart and re ported and tuned. By then something else will go wrong with one of the runners.
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Post by pinkscoot on Jun 24, 2018 16:24:52 GMT -5
I took it for a ride today, I still haven't tuned in the idle, it hangs a bit and pops on decal. The meter says its running way lean. Time to richen t up. The CVT feels better but I may go for the Multivar anyway. The urethane Silent block is not my friend. The vibration is hand numbing, time t go back to the rubber one. Next order I place.
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Post by pinkscoot on Jul 15, 2018 15:03:17 GMT -5
Yesterday I installed a Polini 9 roller variator in the BV250 to solve the variator shifting problem. It was a success this thing is smooth as butter. I was looking at the Malossi multivar but reviews were mixed that it was just okay. Everyone that went to the 9 roller raved about it. Jorge with Scooterpartsco put one in his BV200 and said it was the bomb. They have 9 20X12 rollers that were 9.2 grams each. Stock is 6 11 gram rollers so I guess having 9 rollers instead of 6 means you need more weight? But I also noticed the Malossi comes with 14gr rollers so maybe Polini and Malossi find their variators work better with more weight. This variator uses grease iin the nylon bushing with a spring to retain it. They have a plastic tool to help slide the boss. over the retaining spring. I did notice that when I gunned it from idle there was a little slip so I opened it this morning and found a little grease on the bushing. I pulled the variator and worked it against the oil seals and it went away. I guess the seals just needed to seal with the boss. Here is a drawing from the install guide:
They also included how to install different weights on a 6 roller variator:
I strted thinking about how to do different weights on a 9 roller and I guess you would use 3 different weights.
I went to start the scoot today and it started idled a bit then died. I found a leak at the fuel pump that was weird. The hose was a tight fit I could see it bulging at the barb but there was still a leak that had drained the fuel line over night and wouldn't fill it back. I replaced the hose and still the same problem until I pulled it back about a 1/4 inch then it seemed fine. The pump is plastic and the barb is very smooth. I think my silicone hose just isn't sealing right. I'll try rubber and see how that does.
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Post by pinkscoot on Jul 19, 2018 13:37:01 GMT -5
So its still not starting and sounds different when it cranks. I decided to pull the CVT because that was the last thing I touched. The engine does turn over and there is compression, spark and the plug is wet. I pulled the variator and the ramp plate was stuck. I used some PB Blaster and let it sit. This morning before work I double nutted the crank shaft and put a wrnch on while I worked the plate with a screw driver and got it off. The splines were good on the ramp plate but not the shaft: When I installed it I I thought that I was there had been more threads showing and as I torqued it down it didn't feel right. I should have stopped but no I just kept going. Any suggestions of cleaning that up? I was going to use some emory cloth to get them smooth then see what I had. Maybe a little filing in the grooves themselves. Any suggestions would be appreciated.
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Post by oldgeek on Jul 19, 2018 13:46:42 GMT -5
Blowing up the picture, it looks like new crankshaft time. Not sure how that happened.
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Post by 190mech on Jul 19, 2018 15:14:23 GMT -5
Lots of high end scoot cranks and variators have no inner splines,it all gets driven off of the outer sheave. If you can file the splines so the vari fits squarely on the collar,I'd say it would be OK..
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Post by pinkscoot on Jul 20, 2018 20:22:57 GMT -5
I was able to get it back on but not all the way. I was planning on filing and sanding until I got the ramp plate back and see how it works. I still have the no start problem that I need to solve and I suspect this might have been the cause and I have crank damage. When I check the compression I get nothing on the gauge but do feel it with the finger test. My plan is to get the plastics off and get the gauge seated well and check again. These do have the decompression valves so I will need to disable that. I have the next 8 days off so I have time to work on it.
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Post by pinkscoot on Jul 22, 2018 9:44:06 GMT -5
So yesterday I got into it and I had no readable compression. I pulled the valve cover and turned the crank and the cam didn't turn. When I didn't put the variator on correctly and tightened it and screwed the splines it didn't tighten the oil pump gear and allowed the cam gear to slip off its Keyway so that the gear spun enough to through the timing off then it just pulled off its Keyway. I sanded the splines to get the oil pump gear off and the variator ramp plate sits all the way back. I got that all straight and the timing is either right or 180deg off. I spun the crank and it seemed to spark at the right time. I now need a new timing/oil cover and seal and I'll have to figure out how to install it without the $175 tool. I'll get pictures up later with an idea I have. Word of caution, never run a Piaggio engine without the variator installed right, if you aren't showing enough threads start again.
The fuel leak that only happens with a full tank is actually at the tank. Its where the barb piece sits in. I should have replaced it but got cheap because it looked fine. I drained the tank and will pull it today and see what I can do to resolve it.
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Post by pinkscoot on Feb 18, 2019 18:30:31 GMT -5
It's been a while since I posted about this scooter. I ordered a new crankshaft cover and seal from Scooterpartsco and he loaned me the tool to install it. Here is the area with out the seal. The timing chain is off at the moment: and here is the tool installing it: I buttoned it all up and started it, it idled and ran fine. At that point I had a lot of plastics off and decided it was time to paint it. That turned into a 6 month process, actually just a few days then work got in the way so I had a dining room table covered in parts: One small thing that I needed to fix was the boot on the accelerator pump was completely trashed and would spit a little gas out. I ordered a new one and installed it last week with the plan to get the scoot back together this week. Before I started putting it back together I wanted to start it. Of course the battery was dead so I charged that. I then hooked the instruments up so it would turn over. I hit the button and it tried to start but the starter acted like it didn't have enough juice. I checked connections and fiddled with everything and no luck. I pulled the CVT cover and tried turning the crank and nothing. Oh s--t its frozen. I pulled the plug and turned it and antifreeze shot out of the hole. The carb has 2 hoses that run through a passage on the front and when I pulled the carb what I thought was a little antifreeze got in the intake. Wrong it was more than I thought and it got to the cylinder. I buttoned up the CVT and cranked it to clear it out. Put the plug in and started it. It was a smoking puppy, like a 2 stroke. I cut it off and drained the oil, the Royal Purple oil was a weird shade of purple. I let it drain for a while then refilled and started it up, no more smoke. So now I'm ready to put it back together. Its been so long since I took it apart I had to read the manual to remind me of the order to reassemble. I still need to polish the parts but I hope to get back on it in the morning. So lessons learned, be sure to get the variation on right before turning over the engine and plug the intake so nothing gets in it. No wonder the starter wasn't spinning air compresses much easier that antifreeze.
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Post by pinkscoot on May 27, 2019 18:59:47 GMT -5
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Post by aeroxbud on May 28, 2019 6:03:11 GMT -5
It looks alright from the picture. I'm sure you would have no problem selling it.
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