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Dear Lord! SRAD 750 Carb advice.

Discussion in 'Tech' started by This old Rz, Mar 29, 2020.

  1. This old Rz

    This old Rz Well-Known Member

    Okay bike sat too long with pump fuel and everything gummed up,I decided to take these carbs apart and clean them myself. As I have a few motorcycles and there is no way I can afford to pay others to do my maintenance. DEAR GOD, THESE CARBURETORS HAVE OVER 165 INDIVIDUAL PARTS...
    I have left these parts for 4 months after cleaning wrapped and packaged for reassembly. I have a service manual and I took many pictures.
    1.) do any of you have any experience and advice for a hardcore carburetor newbie.
    2.) If I fail which is 50/50 can anybody recommend someone who will work on them who knows what they're doing I'm in SoCal and can't find nobody willing to do them one place one of the $900.00 F#@k That!
    I'm used to easy RZ350/ Banshee carbs.
    WHAT THE HELL ARE THESE carbs , must have been built by Satan himself. TO SAY I AM INTIMIDATED AND NOT CONFIDENT IS AN UNDERSTATEMENT.
    Thanks in advance for any advice and or Leads any info is welcome
     

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  2. CLM81

    CLM81 Well-Known Member

    First thing is to open the factory service manual. Then take it slow and make sure you assemble everything "by the book"(pun intended) They are not that difficult. The biggest thing I see people miss is the SRAD/ram air hoses. I would also recommend a Factory jet kit since you are in there.
     
    TurboBlew likes this.
  3. fastedyamaha

    fastedyamaha Well-Known Member

    Yep, follow the manual. Should have an exploded view of all the parts. Take your time and don’t get frustrated. You’ll feel accomplished when you’re done.
     
  4. fastfreddie

    fastfreddie Midnight Oil Garage

    On the other hand, a set if flatslides will seriously wake a bike up with none of them pesky hose/airbox/ram tube items to deal with...
    Just put some screens over the velocity stacks and let it suck all the air it needs.
    Besides, Kawasaki was the only mfg to get the ram air right on a carbed bike.
     
    boxcrash likes this.
  5. 418

    418 Expert #59

    I know a guy in Rancho Cucamonga....
     
  6. TWF2

    TWF2 2 heads are better than 1

    It is just carburetor, piece of cake :)
     
  7. Shenanigans

    Shenanigans in Mr.Rogers neighborhood

    Who took them apart and cleaned them?
     
  8. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    CV carbs and the like can be kinda complicated compared to others. I have even made sketches to make sure they go back correctly. Sometimes the linkage on a 4 cyl is a stinker. I always put a carb back together as soon as possible so I don't forget as much. But I agree if you have good cutaway views you will be able to do it from a bag of parts. Set up on a nice bench with good light and maybe even a lip at the work surface edges so stuff can't roll off.

    Recently I bought a bike that did not carburate properly at all. The guy I bought it from told me they just need cleaned. I had the CV carbs on and off so many times they should have had buttons. When I took them apart they were clean and had a new part or two in them. He was obviously not being truthful and I had to figure out the real problem. Fuel pump? Spark timing? Plugged exhaust? Worn cam? CV vacuum level? Arg!! I finally noticed that two of the jets/orifices in the carbs had the same threads and one set on one carb was backwards from the rest. I swapped that one set and saw no improvement. I found a good cross section and figured out other three were backwards and the one had been correct. I put them all the right way and FIXED!

    If someone else has been into something trying to fix it beware.
     
    boxcrash likes this.
  9. fastedyamaha

    fastedyamaha Well-Known Member

    You just gave me flashbacks to the giant pain in the ass it was to tune my fzr400 back in the day!
     
  10. Uncle Snake

    Uncle Snake Well-Known Member

    KWICK - Pete Aronson in Chandler AZ. PM me for contact info.
     
  11. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    The bike I was messing with was an FZR 600.
     
  12. JCW

    JCW Well-Known Member

    https://motorcycleproject.com/

    If you do decide to send it in, this guy is highly recommended. His honda manuals are pretty good too. Dont see a gsxr manual though.
     
  13. racepro171

    racepro171 to finish first, first you must finish!

    i know you bought parts for them, but why not just buy a set of clean ones? Im a carb guy and if they are that bad i start with good ones. usually pretty cheap if not free. make sure your diaphragms have not swollen up and still fit in the grooves.
     
  14. This old Rz

    This old Rz Well-Known Member

    Thank you all so far.
    I'll address some of the above.
    1.) The carbs were not horribly dirty just gummed up from sitting for a month and the bike progressively got worse so I decided I'm going to own these bikes I'm going to have to learn to do it so I did it but did not expect almost 200 parts
    2.) As far as flat slides go hell yeah I'd be all over that however for the price of a quality set of flat slides I can probably buy another motorcycle or a liter bike from the 80s and 90s

    3.) The bike actually ran exemplary it's the best handling motorcycle I've ever owned, from what I was told it was an instructor's track bike at a track day School in N.California for a long time.

    I think that's why the suspension is set up so darned good.. however on public roads it is quite harsh , and I've had a penchant for speed wobbles on uneven rough road , I'm speculating due to being so stiff for track days and likely helped from weeping fork seals.
    all the stickers on the rear shock on the front forks with specs are from a company called " Catalyst Reaction".
    4.) Thanks for the leads I will look at all of them if I don't do this myself correctly the guy in Rancho Cucamonga is not too far from me if I'm going to pay somebody to do it I certainly want an absolute specialist who is familiar with these carburetors so I can be one and done with it.. not sure like to learn how to do it all by myself.
    5.) I just have not looked yet but if the diaphragms are deemed unusable. There are no tears or rips in them or and they appear supple one appears to be a little deformed as it is out of its captive bowl.
    Im assuming Id be able to order those still.. I would hope?
    6.) Thanks for the Honda card guy lead as I have two 86 VFR 750 s.. that is scheduled for the next project bike after the GSXR. My rz350 is now on its 12th a year of getting worked on I don't know if I'll ever finish it but I got $8,000 worth of parts for it... lol
    Thanks again everybody in the intro keep it coming it's appreciated also any other information on SRAD750 is more than welcome!
     
  15. TWF2

    TWF2 2 heads are better than 1

    If I remember those are pretty much same as sv 650 carbs. I used srad needles in my sv carbs.
     

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