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[Fullsac Performance]

Has anybody ever tried to drill out the orifice in the stock comp release to bleed off more volume for the larger motors?
Getting it to spin faster right out of the gate seems like it could help too. Even my new 2014 103 seems like it cranks slow and could use some more bleed off.
 
SG

[FlaHeatWave]

'Know y'all are talking built motors here but, the '05 SEEG (bone stock) acts the same way on some fuel stops (hot restarts, only). When I start the bike in neutral, on the kickstand, no clutch, just hit the button, it doesn't sneeze any where near as much as when the bike is upright. I know my process might sound funny, but even though the bike is EFI, it seems to have a "start sequence" that it prefers. Nowhere near as critical as kicking the Shovel lol!

Steve, I have wondered the same thing about "drilling" the ACRs, please let us know what size bit we need to use when you figure it out

[GMR-PERFORMANCE]

From what I see many times the engines that are modded will require extra fuel on the start and restart hot can some times want a fair amount of extra fuel to light right off. Many times when tuning that can be tricky based on what the temp is when its tuned.   Super cold stuff can be a crap shoot and all you can do is add a little extra over what is working at the coldest temp you have to deal with. Hot restart .. well thats easy let the bike get up to say 275 temp. Shut it down let it sit for 10 minutes or so and then see what the temp climbs to and see how it starts.


The stock ACR pulses as the engine cranks so it is NOT a open / closed item.  Stock ACR will yield approx 40-50 lbs of reduced PSI.

[SDCVO]

Definitely doing it more lately and before last weekend, never happened at cold start (did happen on the 2nd day at first start where I had to hit it twice). For the first couple of thousand miles it only happened a couple of times but now about 20% of the time. Talked to my dealer today and they are going to warranty (I think that is very cool of them)the compensator to the brand new one that just came out on Wednesday. I am hoping that will take care of the problem. I really cant imagine it being the tune because it runs amazing in every other aspect..

[FlaHeatWave]

Talked to my dealer today and they are going to warranty (I think that is very cool of them)the compensator to the brand new one that just came out on Wednesday. I am hoping that will take care of the problem. I really cant imagine it being the tune because it runs amazing in every other aspect..

Are they going to glue the piece in the primary cover or are you going to get the new primary cover with the trough built in?

Let us know if the new comp gets rid of the starting issue

[sadunbar]

Are they going to glue the piece in the primary cover or are you going to get the new primary cover with the trough built in?

Let us know if the new comp gets rid of the starting issue

If done properly (following the instructions), there's no reason to fear gluing the new trough into the primary cover.  It's not worth the expense of buying a new primary cover...

JMO... 

[INDEPENDENT_1]

I would bet that it is fuel related . The pop and cough on start up is due to  lack of fuel. Intake leak or needs a slight bump on cold start fuel and or inj pulse on start up. I have seen some of the most beat to death comps and not one has ever effected how the bike started. Call Bob and he can make a change to the map and reload it . 

I agree with this.

[grc]

...............................
 I have seen some of the most beat to death comps and not one has ever effected how the bike started.
...............................

Perhaps a little clarification is in order.  If the sliding surfaces and thrust surfaces are worn, then you are most likely correct.  However, if you think back to the original compensator design with the highly variable spring packs, plenty of those POS's did in fact cause starting problems.  There are many many reports of starting issues being fixed by replacing or shimming those spring packs.  The same has occasionally been reported even with the later compensators.  If replacing the compensator and spring pack fixes the problem, as several have reported, then I think it's a valid place to look before assuming a tune that worked fine before has suddenly changed on it's own and is getting worse.  People way too often jump straight to the tune before eliminating the mechanical possibilities, thus just covering up the real problem until it gets much worse.  Things like air leaks for instance.  I specifically asked the OP if this problem was evident from the beginning or has just recently started, to help determine if perhaps it was related to the tune.  I believe the indication was that it has been getting worse over time.

JMHO - Jerry

[SBB]

With 17K on the compensator, and 135/135+, it's highly likely a worn compensator causing the issue.  Classic symptoms.  Knowing Bob, it's not tune related.  The symptoms don't relate to a tune issue either.  To have it "backfires and puffs of smoke coming out of the air cleaner" a spark plug has to be firing with an intake valve slightly open - which points to a worn compensator.  

I'm thinking sadunbar has this one nailed.
Bob at RC does a great tune.
Having been thru a 120 @140/141 and two 110's with the same symptoms a replacement compensator solved the problem.

SBB

[VANAMAL]

My bike became hard to start about 50% of the time. It would cough back and start hard. It hasnt done it since the new compensator was put in. Easy install and the new design looks improved

[GMR-PERFORMANCE]

Opinions are what they are. . A tune that is just off a touch can be causing the issue. Bob and I are friends its nothing against him on a personal level.  Every one of us that tune for a living has had this come up. The thing is,.. it is a simple item to make a change to reload the map and see what happens before buying parts. This time of year you are also dealing with changing fuel type. It may be more than one thing as well, will have to see what happens.  

[hrdtail78]

What happens when you roll throttle a bit while starting?

[SDCVO]

It either fires up immediately or does the backfire/cough smoke deal regardless if i roll the throttle a bit or not. It definitely has got much worse over time. Taking it in first thing tomorrow and will report back if the compensator fixes it or not. Obviously hoping thats the problem.

[SDCVO]

Good news is that it looks like it was the compensator as the tech said it looked bad when he took it out. Bad news is that he found a cracked clutch basket and the part is on back order. The dealer did find a few in other inventories on the east coast and are trying to get one of them to give it to them so they can overnight it. Great news is that they warrantied the compensator and the clutch (I put in a Barnett Scorpian) which i think is amazing of them and have told me that if they can't get the clutch basket from the other dealer will give me a loaner bike until the part comes in. I know many have had bad experiences with dealers but I gotta say that I think this is going way above and beyond for me and really wasn't even expecting them to do it. I would definitely call that "world class service".
Thanks to all for the help!

[FlaHeatWave]

Good news is that it looks like it was the compensator as the tech said it looked bad when he took it out. Bad news is that he found a cracked clutch basket and the part is on back order. The dealer did find a few in other inventories on the east coast and are trying to get one of them to give it to them so they can overnight it. Great news is that they warrantied the compensator and the clutch (I put in a Barnett Scorpian) which i think is amazing of them and have told me that if they can't get the clutch basket from the other dealer will give me a loaner bike until the part comes in. I know many have had bad experiences with dealers but I gotta say that I think this is going way above and beyond for me and really wasn't even expecting them to do it. I would definitely call that "world class service".
Thanks to all for the help!

What Dealer? The boys at Sweetwater hooked me up last Oct...