Any need for larger caburetor?

Bugaboo · Post by **Bugaboo** » Wed May 18, 2011 3:36 am

Got the 24mm oko and 4 reed manifold. Fabricated an adaptor plate out of sheet metal and mounted everything yesterday. Putting up some pics soon.

These are the jets I got
1 x MAIN JET for PWK KEIHIN OKO #118 ┬ú2.90
1 x MAIN JET for PWK KEIHIN OKO #120 ┬ú2.90
1 x MAIN JET for PWK KEIHIN OKO #122 ┬ú2.90
1 x MAIN JET for PWK KEIHIN OKO #125 ┬ú2.90
1 x SLOW / PILOT JET for PWK KEIHIN OKO #48 ┬ú3.10
1 x SLOW / PILOT JET for PWK KEIHIN OKO #45 ┬ú3.10
1 x SLOW / PILOT JET for PWK KEIHIN OKO #50 ┬ú3.10

Will start big and move down if things point that way.

Probably getting a uni filter even though I received one with my carb.

I've heard of spraying carb cleaner at any seams and listen for any changes in engine revs to check for leaks. Anyone had success with this? I'm very anxious to see if my sheet metal adaptor will pay off.

Wheelman-111 · Post by **Wheelman-111** » Wed May 18, 2011 1:10 pm

Greetings:

I use an unlit propane torch to check for vac leaks. It does work. If you fumigate the filter, you can hear the rev change immediately. Then move to any place a leak is suspected and listen for similar change in RPM. Remember that some vac leaks are speed/vibration/bump-dependent, so it isn't foolproof.

Bugaboo · Post by **Bugaboo** » Wed May 18, 2011 5:10 pm

Some day I may set up a pressure test system by plugging the exhaust port and manifold, but using the carb cleaner or propane torch seems so much more practical.

Just mocked up my wild lion exhaust today. Definitely not a perfect fit. Fiddled around for some time. Ended up grinding of some weld and widening the chamber mount holes. Waiting for my jets to arrive and then it's show time.

Bear45-70 · Post by **Bear45-70** » Wed May 18, 2011 5:58 pm

Bugaboo wrote:Some day I may set up a pressure test system by plugging the exhaust port and manifold, but using the carb cleaner or propane torch seems so much more practical.............................

Been done for vacuum and pressure testing the crankcase seals. The spraying is 20 times easier.

Bugaboo · Post by **Bugaboo** » Wed May 18, 2011 8:22 pm

Only advantage I can see is not having the risk of starting an engine that has an air leak.

Bugaboo · Post by **Bugaboo** » Thu May 19, 2011 11:00 am

Here's a pic of my adaptor. Not trimmed around the contour of the manifold but I don't see the point in making those difficult cuts until I see that the thing works, so it's just a large square cut to clear the cylinder and left case. The gap between the manifold and sheet metal may look big because I used perm marker to get outlin of manifold on to the sheet metal and never cleaned it off. My jets showed up as I was typing this.

: 013.jpg (58.2 KiB) Viewed 4796 times

Bear45-70 · Post by **Bear45-70** » Thu May 19, 2011 1:02 pm

Geez, someone who takes more out of focus pictures than Wheelman or me.

Bugaboo · Post by **Bugaboo** » Thu May 19, 2011 4:27 pm

My batteries were out so I used my girlfriend camera. Just cross your eyes you'll see it just fine

Bugaboo · Post by **Bugaboo** » Wed May 25, 2011 11:14 pm

built and did pressure test. Solved problem leaks: oil plug and my actual tester leaked. Crankcase gasket was good which was what i was worried about because it's something I was not comfortable fixing. Pressure did not hold at 6psi for 6 mins. The seam after the reed before the manifold leaks. Not at bolt holes and gasket. Any liquid gasket suggestions (rtv, anarobic gasket, etc)? Bolts tightened as much as i can.

Bugaboo · Post by **Bugaboo** » Wed May 25, 2011 11:16 pm

Oh I will be doing vacuum test too. Renting vacuum pump soon. Once manifold leak is solved will still be doing starter fluid/carb cleaner/propane test also. Surprisingly my self-made sheet metal manifold held pressure

dun rite · Post by **dun rite** » Wed May 25, 2011 11:39 pm

Hello. Not sure but maybe Honda bond. same stuff used to seal crankcase. Might make almost impossible to remove later though.

Bugaboo · Post by **Bugaboo** » Thu May 26, 2011 12:04 am

dun rite wrote:Hello. Not sure but maybe Honda bond. same stuff used to seal crankcase. Might make almost impossible to remove later though.

Not sure if i'm concerned about getting it off later just want good seal and no ill effects from peices falling off or chemical reaction

fastplastic · Post by **fastplastic** » Thu May 26, 2011 7:53 am

kingkamehameha wrote:Waste time just build a dio son

some people like wasting time and money.... been there done that! thats why i have a dio spree

Petrock's 1984 Spree · Thu May 26, 2011 9:28 am

A little Hondabond works great and it is easy to remove to, I've used it on my intake and on my gear cover with gaskets. To get them off you take out all the bolts and gently tap it with a rubber mallet and the two pieces come right apart.

Bugaboo · Post by **Bugaboo** » Fri May 27, 2011 11:36 am

fastplastic wrote:
kingkamehameha wrote:Waste time just build a dio son
some people like wasting time and money.... been there done that! thats why i have a dio spree

Ok thanks

Got some honda bond yesterday. A little of that stuff goes a long way. Letting it set and will do another pressure test over the weekend

Honda Spree and Elite 50 Forums

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