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Post by niz76 on Oct 11, 2014 21:30:14 GMT -5
Yay! Hooray for sparks in the sink!! Glad u got it bro! That Hoca boss is a little short to get us big boys launching- may need to put those spacers on the end of the boss to get the belt to get down in there.... BTW- That part behind the vari plate is the e-start clutch  |
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Post by 90GTVert on Oct 11, 2014 21:47:28 GMT -5
Sorry to hear it was a hassle. Must be an issue with the small spline Hoca I guess. I've never had an issue with all of the large spline versions I've used.
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Post by jhobe6678 on Oct 12, 2014 8:01:03 GMT -5
Here's one view of the vari on there finally. Sorry I couldn't get this up last night. In this one you can kind of see the washer I put behind the kickstart pawl.  And the other view.  |
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Post by jhobe6678 on Oct 12, 2014 8:02:26 GMT -5
Yay! Hooray for sparks in the sink!! Glad u got it bro! That Hoca boss is a little short to get us big boys launching- may need to put those spacers on the end of the boss to get the belt to get down in there.... BTW- That part behind the vari plate is the e-start clutch I'm not worrying about that just yet. I'll see how it is in a bit once I wake up. But yeah, yay for sparks haha. |
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Post by jhobe6678 on Oct 12, 2014 8:03:58 GMT -5
Sorry to hear it was a hassle. Must be an issue with the small spline Hoca I guess. I've never had an issue with all of the large spline versions I've used. I know Dave said the shaft mushroomed a little, but I didn't think it was going to be this big of a PITA. I'm not sure if it was the crank or the boss, but Niz said he had a hard time too so I figured what the hell. It took a lot of work getting this damn thing on but I'm glad I was able to solve it last night. Lord help me if I ever upgrade the crank and have to go through this again. *sigh* |
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Post by jhobe6678 on Oct 12, 2014 9:37:58 GMT -5
Ok so I got it riding today.
With the 4g stock rollers the Vari came with, I barely was able to get it up to 25mph it seemed. So I immediately came back and put in the 5g rollers. I'm thinking the variator had to do its initial break-in maybe now. But with the 5g, the takeoff was ok but I got it to 36mph (GPS). I had to make a few trips up and down the road because my GPS program wasn't recording for some reason.
I'm going to bump up half a gram and mix the 5g and 6g now and see if that helps. It looks like the belt still isn't making it all the way to the top of the plate, but it def is an improvement over yesterday with the stock vari. There's not much wind out today so I'm hoping it stays that way. The road I'm testing on is mostly flat, a few grade changes but nothing drastic to affect top speed.
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Post by jhobe6678 on Oct 12, 2014 10:11:25 GMT -5
So with a mix of the 5g and 6g (=5.5g) rollers, I was able to get to 37mph but noticed my RPM's dropped. Before I was maxed out at 8,000rpm, this time it was around 7,800rpm. I'm going to try putting all 6g rollers in and see what happens. Travel on the belt looks the same to me. Though it's hard to tell since the faces are all black. I'll see if I can get a sharpie to show up on it this time too. I do notice the low end takeoff isn't that powerful, but then again it never really was before. To be honest, it feels fine to me. I don't need to jump off the line like a bat out of hell just yet and I'd rather low RPM at higher speeds to be honest. But hey, it's all still an improvement over stock!
Now this really gets my blood going to get the new pipe and bbk on it! I feel like the carb could still use some love though, but at this point maybe it's a waste of time since I have a BBK and pipe on the way.
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Post by jhobe6678 on Oct 12, 2014 10:54:17 GMT -5
So here's the short version.
Hoca Vari with stock 49cc motor.
4g weights - No joy, maxed out to around 8,200 RPM barely able to get to 30mph. Didn't even bother to check belt travel.
5g - It moved, got it to 36mph, max RPM almost to 8,200. Takeoff was ok. Belt seemed like it wasn't going all the way up.
5.5g - Max speed 37mph, max RPM around 7,800 rpm. Takeoff was ok. Belt seemed to be going up more but I wasn't sure, didn't mark it with a sharpie.
6g - Max Speed 37mph, max RPM around 7,200 rpm now. Takeoff feels fine to me still. Belt travel goes almost all the way up, maybe a couple MM of sharpie left.
So, where should I go from here is what I'm wondering. I'm thinking of doing the clutch springs and see how that goes.
Keep in mind I've been running this whole test with the CVT cover off and it's not heating up terribly. Does that bearing even do anything in the CVT? I dont' know. I do know that I'm going to cut the CVT open a litt.
So I have to say so far I'm pretty happy with the results. I did check the ratio of bell RPM to tire. It's about 13.5:1. Maybe a gear change is in order in the future? Who knows. Considering I just got this heavy beast of a bike 5 more MPH and almost as fast as the M1 4t I have that's all stock with barely over 500 miles on it, I think I'm going in the right direction.
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Post by moofus02 on Oct 12, 2014 11:11:49 GMT -5
The cvt cover is a structural part
Sent from my SPH-L720 using proboards
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Post by jhobe6678 on Oct 12, 2014 11:15:56 GMT -5
The cvt cover is a structural part Sent from my SPH-L720 using proboards I know, but how much? I will end up cutting some of it out, for venting of course. I've seen what some have done so I know not to go too far. |
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Post by 2TDave on Oct 12, 2014 11:35:03 GMT -5
The reason I had to shim that bearing in your cover was because it does do something. Without it you'll end up wearing the shaft or bearings in the gear box. I cut up my covers pretty radically but I leave all the structural reinforcements intact and don't go to near the bearing. Once you do a pipe and bbk and revs come up you'll generate enough heat to experience contra spring fade that robs acceleration. Until then it's fine. Some just drill holes.
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Post by jhobe6678 on Oct 12, 2014 11:38:14 GMT -5
The reason I had to shim that bearing in your cover was because it does do something. Without it you'll end up wearing the shaft or bearings in the gear box. I cut up my covers pretty radically but I leave all the structural reinforcements intact and don't go to near the bearing. Once you do a pipe and bbk and revs come up you'll generate enough heat to experience contra spring fade that robs acceleration. Until then it's fine. Some just drill holes. Oh, I wasn't planning on chopping that much off really. I know what you mean though. I don't think I'll be cutting but may just drill in some 1/2" holes. I notice on my 4t the CVT is vented already, there's one hole in the front with what looks to be a small snorkel on it, a hold in the bottom and one towards the back. I'm trying to remove it now to see what the vari looks like and if there's any restrictions I can move. If not, I'm going to at least remove the PAIR system from it today if my back calms down a bit. I have the fuel and vac lines too that I want to replace. For now, the Baccio stays as is I think. Till I get some advice on my results. |
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Post by Sitticuss on Oct 12, 2014 12:09:23 GMT -5
maybe a 1K contra and 2K clutch springs....I have the 90cc version of the Hoca....No sanding required....guess I got lucky there......Nice job getting that in....  |
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Post by jhobe6678 on Oct 12, 2014 12:30:56 GMT -5
maybe a 1K contra and 2K clutch springs....I have the 90cc version of the Hoca....No sanding required....guess I got lucky there......Nice job getting that in.... Thanks! Yeah I thought I was losing my mind yesterday. Thank god for this forum, really guys. Though I suspect I'm going to want to open this engine up at some point, I think for now I'll leave well enough alone. I'll just stick to the top end rebuild for now while keeping some spares around just in case. I've been wanting to ride too much to continue to screw with it any deeper. Now I'm toying with my 4t for a bit, have to get the kickstarter back together and the CVT cover on so I can change the fuel & vac lines and hopefully do a fluid change today. |
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Post by jhobe6678 on Oct 13, 2014 9:48:45 GMT -5
I've been reading up on Brent's 49cc project post. Sounds like he was doing the same things I was. Except I haven't really "tuned" my carb but it seems to be ok for now. I also am on a large frame scooter but I'm about 60lbs lighter than him.
That being said, clutch springs are my next move, but he's got me thinking of replacing the contra spring now too. These are just thoughts.
I'm also thinking about the gearing.
My goal for this bike isn't so much TOP speed but a good comfortable cruising speed. Right now the stock head/piston is still in. The BBK and Pipe are on the way.
As for carb tuning, nothing has been changed on the carb except for the clip on the needle was moved so the needle is one notch higher (richer) than it was when I got it. I had to move it because it fell out of the middle notch. That shouldn't affect the cruising/ top speed though, right? Isn't that jetting? I'm thinking of throwing in a 75 main jet and seeing how it runs, then moving up or down.
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