oh boy does grampsizing work!

Started by allstateguy, April 27, 2016, 19:05:33 PM

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allstateguy

#16

CDN I could have done that (it has a drop out under the rear wheel) but it was easier to jack it up under the rear suspension rocker, just enough to allow the tire to rotate. Then remove the rear fender, take out the axle, rear sprocket nuts, front sprocket nut and swip/swap all done!

I've also just about finished replacing the clutch (friction and steels) and I'll give a report in a few days, if it ever drops below 110 degrees here, on whether I've fixed the clutch drag problem I've been having.

I found by removing the stock rear piece on the exhaust, why my bike sounds so healthy. Some prior owner went in and put several 3/8" holes in the pipes and flanges you see when you take off the chrome extension. Even tho all you see is the one pipe coming out, there is room around the rear plate for lots of exhaust and sound to come out.

Current bikes/projects:  1982 Yamaha Vision; 1967 Yamaha 180 Bonanza; 1974 Jensen-Healey

CDNRatMan

 allstateguy, if you have a lift were the center is droppable then you can but if not then like me you will have to remove the seat, remove the fender then get to the final drive and swap out the sprocket.

GPS is not to get you THERE but rather to get you home from THERE

pietperson

What jets did you use and where did you get them? Looked on dynojet website and couldn't find them. And where is the place to get sprokets and progressive springs?
You guys seem to have all the answers and sources.
I now have to use the choke to start even on a warm day, and run it for a couple miles with the choke out  before it will idle. It would be nice not to have to do that.
Has anyone ever been checked for pollution control inspection?
pietperson


CDNRatMan

   I am going to say as I have never tried it that you can not remove the rear wheel without removing the fender.

GPS is not to get you THERE but rather to get you home from THERE

allstateguy

sprockets ordered. if you get the bike high enough on an underchassis lift, can you drop the rear wheel without messing with the rear fender?

the springs will be ordered as soon as I sell a few more Puch parts.

Current bikes/projects:  1982 Yamaha Vision; 1967 Yamaha 180 Bonanza; 1974 Jensen-Healey

greenbarn

No Worries

CDNRatMan

   oh the sprocket swap is a must mod also......stock is 17 / 40 and I went to 18 / 38 really made a nice change.

GPS is not to get you THERE but rather to get you home from THERE

greenbarn

Progressive front springs...    one of the top 3 upgrades for the 800 (IMO)....   and you already did the grampsize mod. 

No Worries

CDNRatMan

 Would depend on how old the suspension is and the fork oil is, might be time to change the front fork oil? Check the springs to see what shape they are in, and see how your rear shock is set up.
Again depending on how harsh the bumps and such are, even mine with all new suspension still finds some of them spots that nothing will cure. I installed progressive 1500 front springs on my 800, and a progressive rear shock and have been happy with the whole set up.

GPS is not to get you THERE but rather to get you home from THERE

allstateguy

Just got back from a 60 mile jaunt to the north of PHX, trying to stay off freeways. Very windy tho. Ran flawlessly, power and sound are just what I hoped for. Many thanks to the peeps that put the recommendations up for modifying the CVK carb.

One minor comment: the bike hits sharp bumps (sunken manhole covers, poorly patched pavement) very harshly, but the suspension seems smooth and forgiving in most other riding. Is this something I just need to get used to?

Current bikes/projects:  1982 Yamaha Vision; 1967 Yamaha 180 Bonanza; 1974 Jensen-Healey

CDNRatMan

  Yup does look stock, and if it is loud then it has been changed some how because when I put the sock system on you can hardly hear it idling........

GPS is not to get you THERE but rather to get you home from THERE

allstateguy

like I said it looks stock, but it has a nice sound. Louder than stock.

Current bikes/projects:  1982 Yamaha Vision; 1967 Yamaha 180 Bonanza; 1974 Jensen-Healey

CDNRatMan

can we see a picture of the exhaust then?

GPS is not to get you THERE but rather to get you home from THERE

allstateguy

looks stock, but I believe a prior owner must have removed any baffles at the back. Just as loud as my Sportster was with a Samson 2 into 1 with a megaphone.

Current bikes/projects:  1982 Yamaha Vision; 1967 Yamaha 180 Bonanza; 1974 Jensen-Healey

CDNRatMan

  What exhaust set up are you running?

GPS is not to get you THERE but rather to get you home from THERE

allstateguy

holy crap!

followed the instructions (mostly) except for the crankcase ventilation where I used what I already knew and made this one breathe through a small K&N breather and two hoses that go into the carb side of the main air cleaner.

so put it all back together (with just a few swear words), set the petcock on prime, pumped the twistgrip once, no choke, and within three rotations, vroom, puta puta puta. Vroom when you open the throttle, not guh, then die.

so time for S100, hose, and some clean towels. Maybe go around the block tomorrow, but my confidence in this bike has gone up 800%

yeehaw!

Current bikes/projects:  1982 Yamaha Vision; 1967 Yamaha 180 Bonanza; 1974 Jensen-Healey

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