So should I install the 990 carb

Add the 990 CARB OR STAY WITH THE 1107


  • Total voters
    9

1Coopgt

Well-Known Member
Messages
1,148
Location
Rochester,NY
So I picked up a Modified 990 carb and the spiral diaphram . As the poll asks . And will I really see much of a difference?
 

Striikar

Well-Known Member
Messages
176
Location
LI, New York
Z, I think everyone has you beat on this one!!.πŸ˜›

I say try it,youve got nothing to lose. It can also provide you advice to give to the next person who's wondering the same thing.
The hardest part after all is the paying for the carb,but then not using it?. Well I think you know what we all here think about that.
Boo Boo......boo
If you don't want it,I'll buy it since I can use one. I'm serious on the buying part.
I mean-What's Z gonna do with it besides look at it meaningfully.
πŸ˜πŸ˜›βœ”
 

Z.hb71

Well-Known Member
Messages
6,398
Z, I think everyone has you beat on this one!!.πŸ˜›

I say try it,youve got nothing to lose. It can also provide you advice to give to the next person who's wondering the same thing.
The hardest part after all is the paying for the carb,but then not using it?. Well I think you know what we all here think about that.
Boo Boo......boo
If you don't want it,I'll buy it since I can use one. I'm serious on the buying part.
I mean-What's Z gonna do with it besides look at it meaningfully.
πŸ˜πŸ˜›βœ”
What do I have to do with buying it πŸ€”πŸ€£
 
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Seandonato73

Well-Known Member
Messages
2,255
There should be no discernible difference between the two carbs if properly tuned. The 1107 has a slightly larger venturi that make the choke plate a non issue for flow. The spiral diaphram help greatly in the bottom end pickup on my engine.
 

crucialRC

Well-Known Member
Messages
1,169
Location
Maryland, USA
I say try it out for yourself Coop. It's just a few bolts and a linkage.πŸ‘πŸ½ if you see a difference like I did then leave it in and put the spiral diaphragm upgrade in the 1107 and save for a spare. Then when it's time for some 990 maintenance swap it out and install the SD upgrade in the 990.
 

1Coopgt

Well-Known Member
Messages
1,148
Location
Rochester,NY
So spent a little time Installing the Spiral Diaphragm in the 990 Carb and attached the Chase filter to the back side of the carb. Now it's ready to be installed on the buggy tomorrow when I get home from work. So there is a construction site about a half mile away from me here that is just begging for the buggy to go play with it . So either tomorrow or Sunday is going to be play time . This could be epic . Hopefully I don't break anything.:p Of coarse there will be video.IMG_20190912_212021.jpgIMG_20190912_205713.jpg
 

Billp

Well-Known Member
Messages
77
I run a 1107 and never needed to use the choke on it. Also run a 990 on another engine and never had an issue with starting it. I just followed what the OBR video told me to do.
 

dougstar

Well-Known Member
Messages
5,016
Location
KZN South Africa
So spent a little time Installing the Spiral Diaphragm in the 990 Carb and attached the Chase filter to the back side of the carb. Now it's ready to be installed on the buggy tomorrow when I get home from work. So there is a construction site about a half mile away from me here that is just begging for the buggy to go play with it . So either tomorrow or Sunday is going to be play time . This could be epic . Hopefully I don't break anything.:p Of coarse there will be video.View attachment 53222View attachment 53223
Licking that chase filterπŸ‘ mmmmm such a small part $25😨 cant justifie the purchaseπŸ€”πŸ€£
 

Craig G.

Active Member
Messages
31
Location
Bend, Oregon
So spent a little time Installing the Spiral Diaphragm in the 990 Carb and attached the Chase filter to the back side of the carb. Now it's ready to be installed on the buggy tomorrow when I get home from work. So there is a construction site about a half mile away from me here that is just begging for the buggy to go play with it . So either tomorrow or Sunday is going to be play time . This could be epic . Hopefully I don't break anything.:p Of coarse there will be video.View attachment 53222View attachment 53223
Super killer carb job photos, what I really enjoy about a chokeless carb is the space you gain from not having the choke lever. I feel that you can really concentrate on your linkage alot better!
 

1Coopgt

Well-Known Member
Messages
1,148
Location
Rochester,NY
Oh just a little piece of info for everyone. So I have a reed case engine , Yamadude throttle linkage and the latest Bartalone Velocity stack. So something I noticed when I first started up the engine for the first breakin was the linkage was hitting the Vstack mount that attaches to the carb. So I ground it down a little bit. I found when I took the buggy out the last time it was still hitting when at idle plus I couldn't turn down the idle speed at all. So I broke out the dremel last night and did a bit more grinding . Hope it was enough.
 
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