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se 50/af05 spree needs further mods

Posted: Sun Mar 20, 2011 11:52 pm
by matzke3
Ok I'm still working on my 86 spree with the se 50/af05 engine and need to take er' further. Currently using a 63cc bbk, variator, and plug supplied from vt cycles (best service out there) and a big foam air filter. Ive been experimenting with different belt lengths and widths. The 5/8 belt was a major failure and I still have a slipping issue when using the rear brake. Ill be ordering a facory belt tomorow as advised by most fellow users. With the 11:1 gears and a 2.75-10 tire top speeds have been between 40-45. Im looking to achieve 45-50 on flats but still have a little wheelie at launch without yanking the bars. Im hoping for help here---

First-Im not sure what to go with on a center spring. I dont want a major stall but a little more launch when I get a 3.00-10 tire. Thinking 1000 or 1500?

Second-The previous owner of the donor bike though it would be a good idea to saw the muffler off so when I built it I welded the spree muffler to the se 50 head pipe. I need a different muffler and was thinking the PG short since over rev I already possible.

Third-Would different reeds be a good idea? If so what and where can I find them?


Finally-Has anyone tried Taz gears in this engine? That close to doable?

Thanks guys

Re: se 50/af05 spree needs further mods

Posted: Mon Mar 21, 2011 3:30 pm
by odinxxix
wait, is this a stock spree motor or is this the variated af05 out of an elitle lx? if it is the second one then the spree(taz gears) will not work. if you have a stock spree then the gears will work great. if it is the variated afo5 what weights are in the vari? and stock belt is always good.

Re: se 50/af05 spree needs further mods

Posted: Mon Mar 21, 2011 3:38 pm
by bc117
wheelman told me that the the clutch shaft from an 87 elite is a different tooth count and will get you to 10:1 which should get you right in that 45-50+ range, i too am currently looking for one also let me know if you find some

Re: se 50/af05 spree needs further mods

Posted: Mon Mar 21, 2011 4:53 pm
by Wheelman-111
Greetings:

Lest anyone get the idea to replace only the 12-tooth clutch shaft gear for the elusive 13-tooth item exclusive to the '87 SE50, read up HERE.. I would never advise to replace only one gear of a set. The mating gears of the 10:1s are probably both different from the "normal" 11.097:1 gears on the SE/05. No, I've never even seen a set of 10:1s. Proceed with caution.

That said, if your BBK has the power to drive them to the max, you should enjoy about a 10% gain in top speed if you can find the 10:1s. Another option is to convert to the SA50 setup - clutch, countershaft, axle and cover - and then get the 9.1:1s or whatever ratio is available for SA/16.

Re: se 50/af05 spree needs further mods

Posted: Mon Mar 21, 2011 10:04 pm
by matzke3
Yes, its the variated af05 from an 87 elite. I used the weights supplied with the oko high speed vair and I never weighed them. The gears I counted out to the 11-1 :(. Ive asked before about aftermarket gear but really do not care to go that way. I'm afraid the ratio would be too steep. So it seems the SA setup is my best bet. This stuff all bolt on??

Re: se 50/af05 spree needs further mods

Posted: Tue Mar 22, 2011 12:07 am
by Wheelman-111
Greetings:

Not exactly "bolt-on", but close. Something about deepening the countershaft bearing socket. TrafficJamz pioneered the full conversion.

You need ALL the AF16 gear kit. If you find all that stuff, there be an engine attached. May as well bolt on the AF16 itself...

Dude! Swap in the DIO!!

Re: se 50/af05 spree needs further mods

Posted: Tue Mar 22, 2011 12:17 am
by matzke3
Haven't been able to find a dio. The se50 donor bike was purchased for a case of beer so I went with it. I've just finished studying the entire 8 pages of se50 dio gear swap and think I'm gonna go for it. The only one thing I never got exactly is what is the difference with the final drive axleshaft?

Re: se 50/af05 spree needs further mods

Posted: Tue Mar 22, 2011 7:33 am
by Wheelman-111
Greetings:

AF05: axle gear has splines and a circlip. Countershaft Big Gear is pressed on. Methinks the countershaft is a mite shorter, too. The case needs a machining job for the longer 16 counter shaft not to bind.

AF16: countershaft Big gear slides on splines. Axle gear is pressed on. Axle cones in thin ('94-early '98) and 2-bearing cover. Thicker (late '98-'01) axle shaft end and single-bearing cover - the left axle end rides bareback in the Alu cover.
Ax Jams how it's done?

Re: se 50/af05 spree needs further mods

Posted: Tue Mar 22, 2011 10:09 pm
by matzke3
Ordered the dio gears :2thumbs: I have a press and a good local machine shop that will do the turning for cheap. The plan is to have plenty of shaft milled so I can adjust gear location as needed. Hopefully I can get the old axleshaft machined to accept the press fit dio gear. Went with the 9.1-1 because Im in rural WI with a good amount of uphill travel. The plan is to tweak final speed/power needs using heavier vari weights and mabye still the 3.00 tire. Kinda wish now I'd went this way in the first place so then I could have torn it apart and asked questions AFTER having actually looked at it. Oh well live and learn.

Re: se 50/af05 spree needs further mods

Posted: Sun Mar 27, 2011 11:00 pm
by eliteguy50
Correct that when switching from 11.1:1 se50 gears to 10.2:1 gears, you will need more than just the primary shaft with the 13t gear.

When converting from af05 gears to af16 gears, you can simply grind down the countergear shaft to make it shorter on the case side.