Venus 50 (Now 96cc!)

[190mech]

Now youre getting somewhere! ;D

[90GTVert]

I ended up with a 95 main jet. It washes half the plug to a lighter color, but half is chocolate and the metal ring is dark enough. It was running great for test runs. I stuck all the panels back on so I could ride and then it had a dead spot and was boggy at low speeds when I went for a long ride. I realised the clutch was not disengaging. I took it around and around the yard trying all throttle positions and couldn't make it bog at any spot. I ended up moving from 1000RPM clutch springs back to 1500RPM springs to keep the clutch working properly even on long rides. Hopefully I can get a ride in today and see if it still has issues. It didn't help that yesterday was one of those days when it felt like the wind was head on no matter which way I rode. Kinda makes it hard to tell if you are lacking power or if it's just fighting wind. The tune could probably use more time, but I REALLY wanted to get out for a ride or two on this 60 degree, sunny, fall, weekend. You can check out bits of my ride yesterday HERE. ;D

Here are pics of the new light as promised. I like it. Turn signal seems like it would draw more attention, so that's a good thing. BTW, after looking at these pics I washed the Venus for the first time since I got it. lol I ride and wrench more than I clean my scoots.

[lshigham]

;D good work, I bet you have yours tuned better than mine. Mine doesn't actually work at all below 7500 RPM, that's the sacrifice I made for speed :riding:

[2strokd]

Looks killer :devil: !
What slide did you say you used?

[90GTVert]

I used the 30 (richest) slide instead of the 40 stock. I took another good ride today with more in town riding. It definitely has a problem at low speeds and there is still an issue with the tune. I think it's actually too rich now at 1/2 throttle the worst. I held it for a bit when I was cruising at 40 something and eventually it started stuttering like it's really rich. I'll try moving the needle back up and if that won't work I guess I'll play around with other needles and combinations of throttle valves and needles when I can. The clutch springs did next to nothing for my takeoff problem. I think it's the variator not letting the belt go down all the way and free up at idle or low speed and then the bog just makes it awful. I've definitely got work to do still, but my goal was to ride for a change and it's plenty good enough to ride around this weekend.

[90GTVert]

I'm starting to miss the SunL. lol

Filled up at the pump to check mileage. 36.74 miles / .897 gallons = 40.96MPG Pretty much right where T2 stayed as well. I'm sure I'll pick it up a bit when it's not so rich, but not much.

[lshigham]

Nov 14, 2010 20:45:05 GMT -5 90GTVert said:

I'm starting to miss the Suh a 135 nL. lol

Filled up at the pump to check mileage. 36.74 miles / .897 gallons = 40.96MPG Pretty much right where T2 stayed as well. I'm sure I'll pick it up a bit when it's not so rich, but not much.

I don't know how you manage it

I'm getting 55 with a 135 main!

[90GTVert]

My bigger engine should be creating more vacuum and drawing through more fuel than it sounds like it would with a 95 main. I had 98-102 mains in the 25mm for T2's 99cc. I had to use 112 or 115 with a 24mm IIRC when I tried to do the stroker in T1 with a 47mm piston. On top of that, you aren't 300lbs so there's a lot more load on my scoot. Then add in the fact that it's really rich in the midrange and bogging from CVT issues on takeoff requireing more throttle. I still don't expect to see over 45MPG with this thing though.

[lshigham]

Nov 15, 2010 6:08:52 GMT -5 90GTVert said:

My bigger engine should be creating more vacuum and drawing through more fuel than it sounds like it would with a 95 main. I had 98-102 mains in the 25mm for T2's 99cc. I had to use 112 or 115 with a 24mm IIRC when I tried to do the stroker in T1 with a 47mm piston. On top of that, you aren't 300lbs so there's a lot more load on my scoot. Then add in the fact that it's really rich in the midrange and bogging from CVT issues on takeoff requireing more throttle. I still don't expect to see over 45MPG with this thing though.

I'd forgotten the weight, I'm only 125 pounds!
How's yours in the low revs (off the pipe)? Mine is like riding a wet kipper down the road :help:

[90GTVert]

Well, with the belt kinda jammed up not getting all the way to low gear it will try to pick the front end up a little just off of idle. Then it feels a little weak till it hits, but overall it makes pretty good power for most conditions when it's in tune. That and the lack of RPM are what make these big block minarellis great little street scoots and generally more reliable than the highly tuned 70s IMO. I'm fat and I have no trouble getting around and keeping up with traffic and such without revving it much unless I'm in a 50 zone or something, so smaller folks would probably really enjoy one of these engines.

[lshigham]

Nov 15, 2010 13:25:04 GMT -5 90GTVert said:

Well, with the belt kinda jammed up not getting all the way to low gear it will try to pick the front end up a little just off of idle. Then it feels a little weak till it hits, but overall it makes pretty good power for most conditions when it's in tune. That and the lack of RPM are what make these big block minarellis great little street scoots and generally more reliable than the highly tuned 70s IMO. I'm fat and I have no trouble getting around and keeping up with traffic and such without revving it much unless I'm in a 50 zone or something, so smaller folks would probably really enjoy one of these engines.

The problems are of my own making, really. It's possible to get 12-13 HP out of a cast iron Polini Corsa at 10000RPM, whilst maintaining the low end power of the stock 50cc.

[90GTVert]

I haven't got to do much tuning. I think a lot of my low speed bogging issues are actually a transmission problem. I had the variator freeze in high gear on a test run and I had to run with it to get going without bogging so bad that it cut out. In the video below, you can also hear (maybe) that it's not disengaging much even on the first run of the vid. The first time I take off it's fine, then it sticks and bogs. Making pretty good power even bogging though.



I added a tach, so tuning will get slightly faster without needing to hook up the big timing light/tach I've been using. The Trail Tech tachs were (and still are at the time of posting) on sale at Cycle Gear for $25 and I couldn't pass that up.

www.cyclegear.com/spgm.cfm?L1=&L2=&L3=&L4=&item=TRT_72-A00



For more info on the install...
49ccscoot.proboards.com/index.cgi?board=instrumental&action=display&thread=1114&page=1

[2strokd]

Ahh, it got ya home tho :thumb:
My Ape was all whacked when i got it and the CVT was stuck in high.
Im sure you will get it.
Are you running the modded vari? What TD?

[90GTVert]

It's the aftermarket TD, cleaned and regreased right before that run. It does it with two different aftermarket varis, one out of the box and one modded. The fan side is modded as well. The problem is that I can't get the vari to open enough to let the belt be free at idle. If I add more washers than I have, it could travel too far... and actually I think that's what it did in that video when it got stuck in high gear. I might go back to the stock vari and rollers. I can't really fine tune the carb till I get a vari straight. A bogging trans can feel an awful lot like an engine issue at times. Another one of those times when a few gears and a clutch would be handy.

[190mech]

CVT tuning can be a real headache when a carb install is in the mix too.I ended up installing my stock carb to tune the CVT then reinstalling the VM22 to tune it....