Forum -> Not-So-Modern
8" wheel top speed
OP zeno Hooked
1966 Bajaj 150 Joined:UTC | UTCquote Thinking of a project, to put a higher displacement engine like a P200 inside an 8" wheel (VBB, Allstate) frame. I believe the original 8" Vespa 150 can go at max 45 mph (50mph?), whereas the 10" wheeled P200 can go 62 or so. How fast would an 8" wheeler do on a more powerful engine? I know some guys already have this conversion on their VBBs |
Typewritist UTC Molto Verboso have had my share of fa*ggy mopeds in my time Joined:UTC | |
Typewritist Molto Verboso
have had my share of fa*ggy mopeds in my time Joined:UTC | UTCquote You aren't going to get a very high top speed because the wheel size is effectively a "gear" and reduces your top speed. I have ridden an 8" VBB with a P200 motor and it is very torquey and you have to be very careful with wheelies, but the 8" wheels will limit your top speed (unless you want to get into the transmission and clutch and mess around with different clutch gear sizes, primary gears, and 4th gear). you will also rev quicker than on a 10" wheeled bike so you won't want to be running at top speed for long anyway. enjoy it for what it is, a fun beast that will never win any long races. |
OP zeno Hooked
1966 Bajaj 150 Joined:UTC | UTCquote I am hoping for some anecdotal numbers about speed. I realize it won't be as fast, but I'm trying to make a decision to build one based on the top speed. |
oopsclunkthud Banned
3:5 Joined:UTC | UTCquote I've clocked a kitted VBB at a real 68mph. Done right you should be able to have good power up to about 8000 rpm. With vbb/vbc gearing you would be going 73mph at 8000 rpm. If you need to go faster (and have the power to) then you can change the primary gearing to p200 (23/65) and that will get you up to 79mph at 8000rpm. |
Typewritist UTC Molto Verboso have had my share of fa*ggy mopeds in my time Joined:UTC | |
Typewritist Molto Verboso
have had my share of fa*ggy mopeds in my time Joined:UTC | UTCquote oopsclunkthud wrote: I've clocked a kitted VBB at a real 68mph. If you need to go faster (and have the power to) then you can change the primary gearing to p200 (23/65) and that will get you up to 79mph at 8000rpm. With a P200 motor and 8 inch wheels? Really? I rode Rob Volz's VBB with a P200 motor all over Portland in 2006 and no way it was coming anywhere near the top speed of a P200 with 10" wheels, much less go faster than that. It revved out long before it reached 55 or 60... |
oopsclunkthud Banned
3:5 Joined:UTC | UTCquote Typewritist wrote: oopsclunkthud wrote: I've clocked a kitted VBB at a real 68mph. If you need to go faster (and have the power to) then you can change the primary gearing to p200 (23/65) and that will get you up to 79mph at 8000rpm. With a P200 motor and 8 inch wheels? Really? I rode Rob Volz's VBB with a P200 motor all over Portland in 2006 and no way it was coming anywhere near the top speed of a P200 with 10" wheels, much less go faster than that. It revved out long before it reached 55 or 60... Oops, I missed the p200 engine part. that maxes you out at 74mph at 8000rpm. Better to kit the vbb engine in my opinion. |
Typewritist UTC Molto Verboso have had my share of fa*ggy mopeds in my time Joined:UTC | |
Typewritist Molto Verboso
have had my share of fa*ggy mopeds in my time Joined:UTC | UTCquote oopsclunkthud wrote: Oops, I missed the p200 engine part. that maxes you out at 74mph at 8000rpm. Better to kit the vbb engine in my opinion. I must be getting dense - I don't understand how a Vespa P200 w/ 10" wheels maxes out around 64 mph, but if you reduce the tire size to 8" wheels it gains 10 mph? |
oopsclunkthud Banned
3:5 Joined:UTC | UTCquote Typewritist wrote: oopsclunkthud wrote: Oops, I missed the p200 engine part. that maxes you out at 74mph at 8000rpm. Better to kit the vbb engine in my opinion. I must be getting dense - I don't understand how a Vespa P200 w/ 10" wheels maxes out around 64 mph, but if you reduce the tire size to 8" wheels it gains 10 mph? Well a stock p200 doesn't rev out to 8000 rpm, but kitted it can. So if you just drop a stock p200 into a vbb with 8in wheels and it only revs out to ~6000 then your top speed will be ~55mph. the scooterhelp gearing calculator is your friend here. You want to use the RPM where you hit max HP as the target RPM in the chart. The VBB/VBC gearbox gives much better ratios for 8in wheels and with a 177 kit and a good pipe will have the power to pull it as well. |
p150strada Member p 150strada Joined:UTC | UTCquote my top speed with 8"tyres is 110 km/h. |
Typewritist UTC Molto Verboso have had my share of fa*ggy mopeds in my time Joined:UTC | |
Typewritist Molto Verboso
have had my share of fa*ggy mopeds in my time Joined:UTC | UTCquote oopsclunkthud wrote: Well a stock p200 doesn't rev out to 8000 rpm, but kitted it can. So if you just drop a stock p200 into a vbb with 8in wheels and it only revs out to ~6000 then your top speed will be ~55mph. Ah, so I am not crazy. He was talking about a P200 motor stock in a VBB with 8" wheels...so yes, torquey, wheelies, but slow on the top speed. |
Professor Plum Addicted
Wrench Joined:UTC | UTCquote oopsclunkthud wrote: ...... Better to kit the vbb engine in my opinion. +1 on that... I have a 200cc 8"er... If I was doing it again I would stick with the small block and tune it.. Malossi 8% upgear on a 10" motor will put the gearing close.. |
Kaos UTC Hooked '08 Voodoo Buddy 282cc Turbo, '73 Yamaha RD350, 1978 Honda NC50. Joined:UTC | |
Kaos Hooked
'08 Voodoo Buddy 282cc Turbo, '73 Yamaha RD350, 1978 Honda NC50. Joined:UTC | UTCquote Ive got a 200cc Rally 180 engine in my 8" Super with the 8" wheels on it still. I've clocked it at 70, but its SUPER wound up at that point. I've still got the 10" gears in it, so the gear ratio is super steep. That being said, it accelerates VERY fast, and is a lot of fun like that. Especially when riding with people who know how fast(or slow) a Super AUGHT to be. ⚠️ Last edited by Kaos on UTC; edited 1 time |
spunkyantlerdance UTC Hooked 64 Allstate 177 71 sprint veloce Joined:UTC | |
spunkyantlerdance Hooked
64 Allstate 177 71 sprint veloce Joined:UTC | UTCquote I kept my eight inch rims put on a pinasco 177[matched] 20/20 dell and simonini pipe . I don,t know how fast it go's having a vespa speedo but more than fast enough . Kit the scoot and keep the look that the chassis was designed for unless it looks stumpy or just off . It's like taking a Cooper mini and lifting it by a few inches . |
⬆️ About 3 months elapsed ⬇️
Lambrettaman Member Joined:UTC | UTCquote I have a Stella motor with a Sito+ and a 22t clutch in a VBB. It goes fast enough, 60ish, that I don't want it to go any faster. Those VNA/VBA/VNB/VBB frames are not up to that much speed. They don't have a proper steering tube in the frame like a Stella/P, just 2 races. The 22t clutch is a cheap and simple middle ground between an upgear kit and nothing. |
jwilliams UTC Addicted '60 Allstate VNB1, '60 GS150 VS5, '61 Cushman VBB1, '62 GS160 Mk1 VSB1, '64 GL VLA1, '74 Rally VSE1 200 Euro, '78 P200e VSX, '06 LX150 Joined:UTC | |
jwilliams Addicted
'60 Allstate VNB1, '60 GS150 VS5, '61 Cushman VBB1, '62 GS160 Mk1 VSB1, '64 GL VLA1, '74 Rally VSE1 200 Euro, '78 P200e VSX, '06 LX150 Joined:UTC | UTCquote My '60 Allstate VNB 8in. will do 50-55 (clocked) with me on it (old fat guy). P150 3-port top end, 20/20 carb, p125 exhaust. Original engine and gears. That's fast enough for me. ⚠️ Last edited by jwilliams on UTC; edited 1 time |
ServiceJeff Hooked
2007 GT200 1962 VBB Cushman Joined:UTC | UTCquote I have a 62 VBB 8inch I did the 12volt conversion but a 20/20 carb and a sito sport exhaust on it and I have hit 55-60mph. Ill never change my bike to a 10inch just get a diffrent bike. Does your bike have the damper on it? |
jwilliams UTC Addicted '60 Allstate VNB1, '60 GS150 VS5, '61 Cushman VBB1, '62 GS160 Mk1 VSB1, '64 GL VLA1, '74 Rally VSE1 200 Euro, '78 P200e VSX, '06 LX150 Joined:UTC | |
jwilliams Addicted
'60 Allstate VNB1, '60 GS150 VS5, '61 Cushman VBB1, '62 GS160 Mk1 VSB1, '64 GL VLA1, '74 Rally VSE1 200 Euro, '78 P200e VSX, '06 LX150 Joined:UTC | UTCquote ServiceJeff, My Allstate did not have a shock/damper. However, I installed a VBB fork when it was my only bike because it felt wonky with both my wife and I on it. Kept the original fork. Now, since I have other rides, I will reinstall the original fork. As you see, I have a '61 Cushman/Vespa too awaiting reassembly after complete rebuild and paint. Does your frame have a "C" stamped into the frame on the left side, just by where the cowl pin hole is? |
⬆️ About 7 months elapsed ⬇️
Vader19 UTC Mr. Clean P,SUPER,V90, 50 Special Joined:UTC | |
RIP Vader19 Mr. Clean
P,SUPER,V90, 50 Special Joined:UTC | UTCquote motor size I'll ask this in this thread, as mentions of big motors in older frames is here. |
Typewritist UTC Molto Verboso have had my share of fa*ggy mopeds in my time Joined:UTC | |
Typewritist Molto Verboso
have had my share of fa*ggy mopeds in my time Joined:UTC | UTCquote Re: motor size Vader19 wrote: I'll ask this in this thread, as mentions of big motors in older frames is here. I can't recall but I put a P200 motor with a Wide Tire kit in a VBB and it worked just fine. Do you have the instructions on how much to remove? |
Vader19 UTC Mr. Clean P,SUPER,V90, 50 Special Joined:UTC | |
RIP Vader19 Mr. Clean
P,SUPER,V90, 50 Special Joined:UTC | UTCquote Right on, I was hoping you'd jump in. I'll try and take some pics later in the week and give you an idea. Thanks |
Typewritist UTC Molto Verboso have had my share of fa*ggy mopeds in my time Joined:UTC | |
Typewritist Molto Verboso
have had my share of fa*ggy mopeds in my time Joined:UTC | UTCquote Vader19 wrote: Right on, I was hoping you'd jump in. I'll try and take some pics later in the week and give you an idea. Thanks Now that I recall I had a Hot Rod Al "lightened" flywheel on there so that may have been why i can't remember having to bang the cowl out any. |
Vader19 UTC Mr. Clean P,SUPER,V90, 50 Special Joined:UTC | |
RIP Vader19 Mr. Clean
P,SUPER,V90, 50 Special Joined:UTC | UTCquote Right on, Ill do some measuring. |
⬆️ About 5 years elapsed ⬇️
dudley_1972 Enthusiast
Vespa Douglas Sportique (VBB), PX200E, 50N (smallframe), Lambretta LI 150 (SII) Joined:UTC | UTCquote Hello all, |
SubEtherBASS UTC Ossessionato 1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others Joined:UTC | |
SubEtherBASS Ossessionato
1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others Joined:UTC | UTCquote zeno wrote: I am hoping for some anecdotal numbers about speed. I only have details on what was once an original VBC 150 Motor... Top (GPS) speed is noted. modify VBC1. 2-port - Fuel... Gimme MORE FUEL ! |
Bluecati UTC Addicted Old douglas ..smallie with polini 115..super with nasco 177 Joined:UTC | |
Bluecati Addicted Old douglas ..smallie with polini 115..super with nasco 177 Joined:UTC | UTCquote 8 is the new ten , vague liar = veglia Running a DR 177 with gran sport piston on super (VBC) cases...cut a third port in the cases with dremmel at home .....the 21 tooth was a game changer...8 inch and points (with no intention of changing anything wicked acceleration,torque tractor eats up hills and wind with a solid 70mph km.hr all day (according to the vague liar...veglia) |
aklimo Enthusiast
68 Sprint, 58 VNA Joined:UTC | UTCquote Got a 8" VNA with a 177 Polini, 26 carb, Mazuchelli crank, SIP Road 2 and the Mallossi 24/63 primary. Goes super fast but gets sketchy at top speeds. I find its a nice city and touring bike but not the best cruiser for highways. |
Post Reply
Forum -> Not-So-Modern
