Mast372MIND Posted February 13, 2010 Report Share Posted February 13, 2010 Hey guys, Need help ASAP. I normally buy jets from jetsrus.com, but I wanted to get some 320s for rejetting today so I went to a Yamaha dealer. I have stock carbs and every size from 260-330, except for the 320s. So anyways, I go in and ask for some and he brings some out. They are the normal hex head jets and they have an identical hex head size and thread pattern to all of the other jets I have. Only difference is that the number is written on the side of the hex head rather than on the top like my others. Instead of just saying "320", they say "320RD" on the side. I also noticed that the beveling is different on the jet throat (viewing from top of hex head) than my others. All of the other jets I have use a larger (wider) bevel. However, the throat of the jet seems to be the right size (it is between the sizes of the 310s and 330s that I have). Are these jets just off brand? Are they okay to use? Will the different bevel make it perform different that the normal 320s? Let me know what you think. Thanks, Rob Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted February 13, 2010 Report Share Posted February 13, 2010 yes they will be fine. they will work the same as your stock jets. as far as the jet size, one size either way wont hurt you too much. if you dont feel safe going leaner, just go with the 330. Quote Link to comment Share on other sites More sharing options...
Mast372MIND Posted February 13, 2010 Author Report Share Posted February 13, 2010 So why do these jets have different engravings? Do you think that they are just an off-brand and the others I have are Mikuni? Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted February 13, 2010 Report Share Posted February 13, 2010 So why do these jets have different engravings? Do you think that they are just an off-brand and the others I have are Mikuni? yes. i still have some jets for stock carbs that have rd on the side of them. Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted February 14, 2010 Report Share Posted February 14, 2010 I think that the jets that come through the Yamaha parts system have the RD on them as I have some that actually came with my bike new that are that way. Quote Link to comment Share on other sites More sharing options...
Mast372MIND Posted February 14, 2010 Author Report Share Posted February 14, 2010 So, I went ahead and put them in. They fit well and the bike runs fine so far (only rode for a few minutes up and down the street). Thanks for all the replies! Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted February 14, 2010 Report Share Posted February 14, 2010 They are a knock off jet. Real Mikuni jets have a small square box in the corner of a square box. That is mikuni's trade mark. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted February 14, 2010 Report Share Posted February 14, 2010 I think that the jets that come through the Yamaha parts system have the RD on them as I have some that actually came with my bike new that are that way. What jets sizes are they? The dealer could have also jetted the banshees that they sold. That way they were not selling new banshee's that run like crap. Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted February 14, 2010 Report Share Posted February 14, 2010 (edited) What jets sizes are they? The dealer could have also jetted the banshees that they sold. That way they were not selling new banshee's that run like crap. My bike came with 200s in it and there was a plastic bag that had 190s,210s,220s,and 230s, they were all like that. It could be Yamaha is buying knock off jets because they are cheaper. Edited February 14, 2010 by bansheesandrider Quote Link to comment Share on other sites More sharing options...
drap660 Posted February 16, 2010 Report Share Posted February 16, 2010 rd= real deal Quote Link to comment Share on other sites More sharing options...
Mast372MIND Posted February 17, 2010 Author Report Share Posted February 17, 2010 What jets sizes are they? The dealer could have also jetted the banshees that they sold. That way they were not selling new banshee's that run like crap. They are 320s. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted February 17, 2010 Report Share Posted February 17, 2010 They are EBC RD Precision Main Jets http://www.powerpacequipment.com/eshopprod_cat_6246-27040_prodtree_370-282-286_product_882465.EBC_BRAKES_RD_PRECISION_MAIN_J.htm Here is a pic of mikuni small round main jet. It has the Box with in a box. That is mikuni's trademark. I doubt yamaha sends the banshee out of the factory with genuine Mikuni carbs and Knock off jets. Quote Link to comment Share on other sites More sharing options...
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