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Looking for a mechanic in OC CA thats familiar with Drz's

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Greetings!

  Long standing member here that just recently acquired another drz400. I am hoping to find a mechanic that is familiar with working / solving jetting issues with a fcr installed. The bike was my buddy's, he recently cleaned and rebuilt the carb with a new diaphragm (?) and it has not run right since. While I don't know the actual jetting, it was running great at one point in time. the symptoms are this. Needs choke to start, runs like it is starved of fuel and coughs / sputters. does not rev up. 

 

Any input is appreciated, to be honest though, I know how much of a pain these carbs are to get on & off and would prefer to pay someone qualified.

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Try Tokyo Mods. My neighbor used them to work out a hard-start issue with his RMZ and he was happy with the results. I doubt they're DR-Z specialists but it shouldn't take a bike-specific mechanic to work out a jetting issue.

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Try Tokyo Mods. My neighbor used them to work out a hard-start issue with his RMZ and he was happy with the results. I doubt they're DR-Z specialists but it shouldn't take a bike-specific mechanic to work out a jetting issue.

And this is why I came straight to TT, thanks dude. After looking at their website I notice they sell and install their own fcr mx kit for the drz. That right there tells me they should know a little more than the average shop. At least in my own head it does lol. Ill give them a call.

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And this is why I came straight to TT, thanks dude. After looking at their website I notice they sell and install their own fcr mx kit for the drz. That right there tells me they should know a little more than the average shop. At least in my own head it does lol. Ill give them a call.

 

 

Right on. If you do go there be sure to let us know how they did. 

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Right on. If you do go there be sure to let us know how they did. 

I called them this morning. They gave me flat rate pricing on the labor to remove and install the carb which was reasonable. They also gave me a flat rate of 159 to fix what ever is wrong with the carb above the labor (that seemed high). All in all, the bike was given to me and has only 4000 miles on it. So $280 - 300 to dial it in seems worth it to me. I will let you know how things turn out once I make it down there. 👍

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i dunno,  $300 to dial in a FCR...  when you can buy a whole new FCR ready to drop in for $200 more...  ive heard and seen so many threads here about older FCR'S not working properly and when it comes to that stage where the carb is simply old and used,  better to buy new,  up to you tho,  good luck,  let us know how it is,  if i was you,  theres was a post here about a few weeks ago,  a member tried to replace worn out parts on a used FCR,  he had it on and off the bike several times,  was told that it is very difficult to fix a FCR carb,  that once certain areas of the carb are opened up/messed with,  it will never function right again,  kinda like removing a persons brain and putting it back in,   just from what ive seen,  i would not spend money on a older pumper carb,   but let us know how it goes. good luck. 

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There are 2 diaphragms in the E model OEM FCR - accelerator pump (AP) and the coast enrichener (CE).  The CE can be eliminated at no cost.  The AP should not cause the symptoms you describe.  The FCR mx type has only 1 diaphragm, the AP.

 

You sure it is an FCR?  The standard Mikuni has a diaphragm to lift the slide plus 1 for the CE. (CE better known as an air cut off valve on the Mikuni)

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 I have been tossing around the idea of buying a brand new fcr, seem like the prices on them have jumped up. When my buddy originally got the bike, it was bone stock. I did the 3x3 mod and re jetted his bike to run with the full yosh. I told him about the fcr mx mod as his next performance mod and instead of heeding my advice he bought a fcr from an unkown application,and got it on with the stock s boots. It ran solid, never felt dialed in compared to the modded drz's I have been on. As noble pointed out, the diaphragm is in the AP, after sitting for some time it had deteriorated and was replaced. That's when the issues started. 

 

I AM on the fence about whether to pay $300 for repairs on this used carb. I think I'd like a brand new one dialed in from start. Just need to find one in budget.

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Edited by zac949

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You live in OC? So I do I... Where about? Me, my buddy and another member on here are going for a ride on sunday, you should join us!

I am in Costa Mesa, once the bike is up and running Ill drop you a pm. Currently, I only have my Gsx1250fa touring bike.

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I think my best logical solution for time being is probably remounting the mikuni that is jetted properly for the open yosh and saving my cash for a new fcr.... At least at that point, Ill have a running bike and the fcr off for a better look at what is going on.

Edited by zac949

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I think my best logical solution for time being is probably remounting the mikuni that is jetted properly for the open yosh and saving my cash for a new fcr.... At least at that point, Ill have a running bike and the fcr off for a better look at what is going on.

that is what i would do,  i bought me FCR MX-39 used on here,  but it was like brand new,  guy only had it on the bike for maybe 2 months and then bought a KTM,  both he and i installed it on the bike exactly how it came from the TT store and the bike runs perfect,  never had to mess with anything,  i love the FCR. 

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 Well, I figured I'd give you guys an update. I bit the bullet and took the bike to Tokyo Mods and the carb ended up needing to be rebuilt.  Knowing the previous owner and the history of the carb and the bike never running right with it, I had them rejet it with the correct needle and such to match the mods on the bike.  I also had them do their "Tokyo carb mod", stiffer ap spring, mod the diaphragm (didn't know that was possible) and something else for the life of me I can't remember.... I am not going to lie, I spent more on the used carb than i should have.... Final verdict? The bike is running like a champ, I had the previous owner test ride it yesterday and he agreed that its running way better than when he had it. Over all, I am happy. It cost me $360 out of my xmas bonus but that is ok. If I didn't mention in the original post, the bike was gifted to me. So i am looking at it from the perspective of a low mileage drz that cost me less than $400. Cheers, ride safe!

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Ill post a video soon so you guys can hear / see the bike run. I will say, i was surprised i was able to get the bike to wheelie without clutch even with that desert tank full of gas and it pulls much harder than my old sm with a modded mikuni.

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