frankd Posted March 4, 2015 Share #1 Posted March 4, 2015 The TCI module on the 83 took a dump, and finally I was able to purchase an 84 TCI for a fair price. This was the 2nd one I purchased. THe first was for an 83, and my 89 only ran on 1 cylinder on it. When I opened it up (after getting my refund--the seller didn't want it returned) it was extremely wet inside. Now I need to change how the pressure module is piped to the engine, but I don't think the 83 has a restrictor. The bike is at my brothers 160 miles from here, so I can't just run out and look. I looked in the Yamaha parts list, and couldn't find the restrictor listed. I have some questions...... 1) Does the 83 already have the restrictor? If it does then I have everything I need. 2) Where is the restrictor listed on the parts fiche? I looked on 'Electrical 2' where the pressure sensor is and also on 'Carburetor'. I didn't see anywhere else that I thought would be where they hid it. 3) Does anybody have an extra restrictor? Thank you, Frank Link to comment Share on other sites More sharing options...
Neil86 Posted March 4, 2015 Share #2 Posted March 4, 2015 (edited) Frank.... its on the AIR FILTER fiche 41R-14489-00-00 NOZZLE No nozzle on the 83 as it used ported vacuum off #2 carb which is not as bouncy as the synch port. Edited March 4, 2015 by Neil86 Link to comment Share on other sites More sharing options...
dingy Posted March 4, 2015 Share #3 Posted March 4, 2015 Auto Zone sells a similar item that can be used to replace restrictor. The stock one also serves to connect 2 different ID vacuum lines together. 2 different size hoses are not needed when intake boot is used as vacuum source. AutoZone also sells a rubber plug that can be used to block port on #2 carb. Don't have that P/N handy. Gary Link to comment Share on other sites More sharing options...
Venturous Randy Posted March 5, 2015 Share #4 Posted March 5, 2015 When I went to the MKII TCI on my 83 and moved my hose to the manifold from the #2 carb, I never considered a restrictor. I will need to look into that. Randy Link to comment Share on other sites More sharing options...
bongobobny Posted March 5, 2015 Share #5 Posted March 5, 2015 The restrictor just "smooths out" the vacuum and makes it more stable instead of jumping around... Link to comment Share on other sites More sharing options...
frankd Posted March 7, 2015 Author Share #6 Posted March 7, 2015 Gary, Did you restrict the connector or just install it as is? If you filled in the connector with something, what did you use? I'm considering a blob of RTV type instant gasket/sealant with a toothpick pushed through it. Then when the sealant cures a bit, just rotate the toothpick and remove it leaving a small hole. Link to comment Share on other sites More sharing options...
Cuthbert42 Posted March 10, 2015 Share #7 Posted March 10, 2015 I have seen people use a small section of red spray straw from a can of carb cleaner siliconed into a hose connector as a restrictor. Link to comment Share on other sites More sharing options...
dingy Posted March 10, 2015 Share #8 Posted March 10, 2015 Gary, Did you restrict the connector or just install it as is? If you filled in the connector with something, what did you use? I'm considering a blob of RTV type instant gasket/sealant with a toothpick pushed through it. Then when the sealant cures a bit, just rotate the toothpick and remove it leaving a small hole. The restrictor I listed above has a narrowing in tube. There would be no need to modify it. Gary Link to comment Share on other sites More sharing options...
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