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Post by Sitticuss on Nov 17, 2014 22:52:59 GMT -5
very nice....
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Post by jhobe6678 on Nov 18, 2014 5:55:50 GMT -5
My grandfather had one of those, he used to build small model boats from wood. From scratch! I mean taking a 2x2 block and carving out the hull and such. That saw brought back lots of memories for me. IT's an awesome tool if you have patience and good steady hands. Good job on those gaskets! Maybe you can make your money back on the saw by cutting custom gaskets for people here?
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Post by oldgeek on Nov 20, 2014 21:25:07 GMT -5
With the help of my buddy we got the crank installed today, and the case half's together. It went smooth as silk with an extra set of hands. We used a heat gun, and freeze spray to install the crank. I took some pictures of the trenching I did on the cases, but I have no idea where they are now. Fairly mild I think, only broke through to the epoxy on the small half. It will be interesting to see how much a bit of trenching affects the performance. I also worked on the head a bit. I tried to mirror the original head as best as I could, but i got tired of screwing with it, and hope this will do.
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Post by oldgeek on Nov 23, 2014 5:06:03 GMT -5
More assembly today. I used 1194 to seal the 2 base spacers together, then several coats of copper spray on both sides of the spacer to seal it between the cylinder and cases. Copper spray for the head too. The final check of durations with everything torqued down is 130 transfers, and 194 exhaust. Squish measured 1.02 - 1.20 depending where I checked it. I could not find nuts & washers for either side of the newly installed small stubs crank Then I realized the newly acquired Vino was right right next to me, with a small stub crank in it. The crank has gotta come out anyway, so I robbed the stuff I needed from the Vino. Man, the more I look at the new Vino, the more I realized I paid way to much for it! Never buy a scooter in the dark LoL! Another change for this time around is slotting the stator. Since I have to use a different flywheel because of the smaller stubbed crank, I figured it would be a good idea. The original flywheel on this build had a 17 stamped on it but the new one is stamped 15. I went ahead and advanced it just a bit. I sealed up the reed cage and intake. The reed cage has .30 CF reeds that I cut out, to replace the fiberglass reeds that were originally in there. The carb is next. I am going back with the 19mm Dell clone, and I think I will use the cool looking (IMO) orange lawnmower filter I used from previous tests. I wonder how much the trenching and other changes will affect the jetting? Better up jet just a bit!
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Post by 190mech on Nov 23, 2014 6:47:28 GMT -5
Love that airfilter!How do you attach it?What is the application?B&S,Honda,Tehumseh??
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Post by oldgeek on Nov 23, 2014 7:11:35 GMT -5
Its a B&S 795066. 2 wraps of tape around the carb inlet, and it fits snug. It's so light it easily stays in place. I gotta say its loud though, even with the foam prefilter around it. But if loud is what you are looking for, its great!
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Post by 190mech on Nov 23, 2014 7:23:52 GMT -5
Thanks!That filter likely flows better than any high end,chrome,gold,carbon fiber,EXPENSIVE filter!!
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Post by oldgeek on Nov 23, 2014 22:07:47 GMT -5
Got it all back together and running today, it took pretty much all day. Tuning was hell because of the wind and rain, but I finally got a nice little ride out of it. On the first two start ups and very short runs it had a weird sound. I decided something was loose, so I put it on the lift to find out what it was. The flywheel was not tight, and would not tighten up. I pulled it off and found the washer I used from the vino was too small to go over the shoulder on the crank. I caught it just in time, all I had to do was clean it up and put another key in. I ended up using a cone washer that is for the variator side, and it tightened up real good this time. A couple more runs and I just could not get the revs up enough, RPM's were just over 9K. I was using 4.5 gram sliders, so I switched to 4 and 4.5 gram sliders, and advanced the timing just a hair. It made a big difference. There was a break in the weather, so I went for a ride. I was having problems with the GPS, I guess due to the cloud cover, but I could tell it pulls harder than it did before. If I go by the GPS I hit a max of 54.94 MPH, and it had a little more, but it was so wet and windy I did not push it. I saw the RPM's under a street light one time @ 10600. Take off is sluggish partly because it is shifting before it gets moving, so I will try a slightly stiffer contra spring when I get a chance. I will also work on the fixed half of the variator, I had to use a new stock one because of the smaller crank, and it needs to be shaved down in the middle a bit I think. I did put the lawnmower filter back on this time around, and had forgotten just how loud the scoot was with it on. It has that MX sound that I love to hear when it gets on the pipe. I also put the cooling fan and shrouds from a Vino on for a test fit. The vino fan is huge so I hope it will keep things cooler in the summertime. I checked compression after riding it, and got 119 with my cheapo comp tester. Sounds kind of low to me considering I had 150 - 170 last time this was together, I think. It is slightly lean at the top, despite having a 98 MJ, because after WOT it idles high for just a bit.
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Post by oldgeek on Nov 24, 2014 19:04:09 GMT -5
Got done with work just after 12 today, time to work on the scooter!
Changed to a 1200 short contra on a bb base, and 4 & 4.5 gram sliders. Launch is slow, but when it hits, it hits hard. Rpm's were up around 11400 top speed was around 53 mph, a little slower than last night. It is still a bit lean in the middle, upper middle, and slightly at WOT. I rode quite a bit, and it soft seized on me after 2 back to back 2.5 mile WOT runs, so I put the choke on for the remainder of the ride. The choke jet I have in the 19mm dell clone is pretty small, and I find it to be a great tuning tool when I am trying to figure out the setup of the carb. It seems to pull stronger and run better with the choke on, after I get away from the pig rich low end the choke causes. I feel like the main jet needs to be just a hair bigger, but may hold off changing it until I get the middle figured out. If I go one notch down on the needle, to richen up the middle, in theory it will richen the WOT just a tad wont it?
It does not seem to be running hot, except for the CVT as I have a non-vented cover on it at the moment. I really need to invest in a CHT setup.
As far as the launch goes, I think the only thing that will help it is to mod the fixed variator half. I hope to get that mod done tonight.
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Post by oldgeek on Nov 25, 2014 19:55:20 GMT -5
I made lots of changes on the scooter today, the weather was krappy, so there was no job related work to be done. I shaved some material from the center of the fixed half of the variator, and even managed to shave a little bit from the center of the moveable half of the variator. It really helped to get the belt lower in the front pulley groove without having to use lots of spacers on the variator boss which usually hurts your top speed. I also put 4 gram sliders in the variator, and a stock contra spring with the BB base on the rear pulley. I have been having good luck with the short stock spring and the BB base. The BB base stiffens up the stock spring just enough to make it work about right in my setup. In the past when I try the 1200 short spring on the BB base, the variator never opens all the way. Also since the CVT was shifting quite a bit before the clutch started grabbing I replaced the 2000 RPM clutch springs with 1500 clutch springs. Afterward I checked the CVT and it was still shifting just a bit before the clutch grabbed, but I left it alone for the time being. I also moved the clip on the needle down 1 notch to the lowest/richest position, hoping to cure the slightly lean condition I was seeing somewhere near WOT. I have learned the hard way not to change so many things at one time, but THIS time I got lucky! The launch is pretty good, about as good as it has ever been. But now when the pipe hits it feels damm near frightening at first. LoL! I guess I am just old. It pulls very hard up to crusing, and then it maxes out around 53.4 MPH @10800 RPM. Still a little slower top speed at this point than before I modded the cases, but it gets there faster. I let a buddy of mine that has ridden it in the past take it for a spin with my GPS in his pocket. He weighs at least 150lbs less than I do and when he came back and handed me my phone his hand was shaking a bit! I gave him hell about it but his top speed was 60.4 MPH. He said there was more left, but not for him...today. Its hard to believe 150lbs costs me 7 MPH on the top end. Oh yeah, I should mention it was raining off and on all day during all of this. I dont ride in the rain much, but the Michelin Power Pure SC tires still feel pretty good despite the slick roads. I got back to the warehouse to check variator travel, and saw about 1/4" still not being used. I like the max RPM of 10800, it seems to be real happy there. I am afraid if I install heavier weights to get the variator to close more, the RPM's will drop. I also wanted to try some 1000 RPM clutch springs, but I dont have any so I put some stock clutch springs in to see if I could get the scoot moving before the CVT starts shifting. I checked the CVT and it still seems to shift slightly before the clutch grabs. It was raining too much to test ride them more than a block, but I think they may be a little too soft. I will find out hopefully tomorrow and if they are I will get some 1000 springs on the way. Any advice on how to get the variator to close further would be appreciated.
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Post by 90GTVert on Nov 25, 2014 20:07:47 GMT -5
Nice results. Anything left to shave on the variator center? I had one of mine pushing till the belt snapped (788 Bando) many times with the Hoca by modding both drive faces.
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Post by jhobe6678 on Nov 25, 2014 20:27:16 GMT -5
I was damn near pushing those RPM's myself the other day on my first run, till I fubared it all lol. Well, it was climbing close to 10k, which I'm not sure if it's safe or not for a stock crank. The crank is solid though and has no play but I don't want to push it too much. I wish I had some valuable input for ya. I'm just glad to see you're making progress on it.
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Post by oldgeek on Nov 25, 2014 21:11:49 GMT -5
Nice results. Anything left to shave on the variator center? I had one of mine pushing till the belt snapped (788 Bando) many times with the Hoca by modding both drive faces. Interesting thing about that. The belt is not riding on the boss, but it is real close. I modded both sides of the variator a bit, and used a .7mm spacer between the fixed half and the boss. I could still shave some off without changing how far the variator closes, I think. After some checking, I found out the variator was not OPENING all the way by about 1mm. It was caused by the ramp plate which was not spaced out far enough from the starter clutch. That caused the moveable half of the variator to actually stop against the starter clutch, rather than the ramp plate like it should. I always wondered why the hoca variator was getting some contact marks on the 3 slide rails, it is caused by contact with the starter clutch. I added a .8 mm spacer behind the ramp plate and along with the shaving mod got the belt to ride pretty low. I only had 2 .8mm shims for the small spline cranks, I used one of them behind the ramp plate, and the other one between the fixed half and the boss. I need to find a source for shims of various thickness for the small spline cranks, I would like to add little more behind the ramp plate, and have some to tune with. I don't know if there is a difference caused by the small spline stuff verses the large spline stuff, but there seems to be something going on changing from the large to the small spline stuff. Could be just my imagination?
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Post by niz76 on Nov 25, 2014 22:40:37 GMT -5
Oldgeek, I was noticing the exact same thing with my Hoca Vari and glued a spacer to it. Sadly, that small spline scoot got stolen and when I switched to the large spline Hoca ramp plate I removed e-start so never got to check to see the difference...
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Post by oldgeek on Nov 26, 2014 5:52:24 GMT -5
Homemade over range, I remember that.
Pretty slick!
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