Modern Vespa

I watched the video on this by scooterwest.

Can I use a manual pneumatic pump for this? because he is adding the fluid as the pump is draining it, so how would I be able to do both these things at the same time with a manual pump?

Can you recommend a reasonably priced battery operated pump if I do need one?

What is the size of the hose that is needed for the pump?

Hi sunbox, you don't actually need a pump of any kind. I rarely use one on bikes but I do use one on cars due to the greater amount of fluid needed. Yes, it may take slightly longer to do the job on your bike without a pump, but not by much. It's up to you! I'd recommend just doing a search on Amazon or eBay for a pump if you are going that route.

Like strom said, you don't need one. It takes a little extra time to pump the system, bleed, pump, bleed, fill repeat but it gets it done. Not sure how familiar you are with the system but here's a different video.

So basically you use the brakes to push the liquid out, add new, push out more, add new and so on?

How is that syringe thing called?

What size is the hose from the nipple?

Also, would 250mm brake fluid be sufficient for both breaks or just one?

harbor freight sells a decent vac pump for about $25.

You create some negative pressure and crack the bleed screw to draw the fluid in. Then tighten the bleed screw before you drain the MC.
You can reverse bleed (push fluid up from caliper) when you get the hang of it and dont get brake fluid everywhere.

TIP: Vac master out first and fill with fresh fluid. Then draw fresh fluid down during bleed process. Also put towels EVERYWHERE during the process so you dont get brake fluid on your paint or gauge lenses.

I replaced my calipers without a pump only took 2minutes to redo the brakes if you know what you doing

On wife's GTV I replaced the factory bleeders with Speed-Bleeders.

Slip a hose on bleeder and pump brakes when fluid gets low add more and keep going till nice fresh fluid is coming out. Tighten bleeder and move on to the next side.

I had a bottle of 12 fluid oz. or 355 milliters and it was more than enough for the GTV

What size Speed-Bleeder do you use?

I have my 10 year old daughter pull the levers for me. I don't need another $25 device sitting on a shelf 364 days out of the year. If you have any one at all that can help you, do it that way. Takes less than 20 minutes for both brakes. You can buy bleeder nipples that replace the stock nipples. Works like a check valve. Let's the fluid out, but no air in.

Yep. Sounds good. You don't have to add new each time. Just make sure the reservoir never goes dry (introduces air in the line). I remember I was able to get 3 or 4 circuits in before having to add more fluid.

A syringe is helpful but you can live without it. Just pour carefully.

No idea on the size of the hose. I forgot already. I just took the scooter to a hardware store and told the folks I didn't know the size. They gave me a few small clear sections to try till I found out what worked.

Also no idea on the quantity for front and back. I used a big bottle and disposed of the rest since it absorbs moisture.

+1. This is the only method I use. I don't have a pump. I can bleed both breaks in 20 minutes after doing it a couple times over the last few years. No reason to have one more piece of greasy gear in the garage.

Best
Miguel

you could say the exact same thing about speed bleeders?

On the front I used the SB1010S and on the rear SB8125L. The rear one was very close to being too short but did work if doing again I would try the SB8125LL which is 5.55 mm longer.

There is a chart here for other sizes:
http://www.speedbleeder.com/size.htm

I ordered straight from Speedbleeder.com. Price was $7.00 each and $5.95 for shipping