Jenna - My 2015 Thruxton build thread - Page 14 - Triumph Forum: Triumph Rat Motorcycle Forums
Air Cooled Twins Talk Discussion of Hinckley Triumph Twin related matters and topics.

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post #131 of 145 (permalink) Old 04-02-2019, 09:22 PM Thread Starter
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I've always wondered how long JB Weld would hold up in an oil bath?
LOL hopefully well past the time I've passed the bike on to the next owner. Their website does say "When fully cured, J-B Weld is completely resistant to water, gasoline, and about every other petroleum product or automotive chemical."

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post #132 of 145 (permalink) Old 04-02-2019, 09:41 PM Thread Starter
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Finally, I have been having an issue with the bike stalling out when idling or sometimes even on clutch in when coming to a stop. I checked and set the TPS sensor to idle spec (.6v) and made sure the throttle bodies are in sync then performed a reset adaption the following day on a cold engine. While the bike was running better under small throttle openings I was still seeing the stalling issue when the bike was fully warmed up.

Lots of reading here on this issue let me to the MAP sensor tubes as a likely culprit as they had to be removed when the new head was installed. I elected to completely remove the plastic tube/rubber boot assembly that came from the factory and replace with a single length of silicone tubing with clamps at both ends.

I ended up ordering the tubing from Amazon HERE. It's thick walled so it won't collapse with any sort of bends which is important for the right side tube. The 3mm opening is as large as you'll want to go. Here's the old MAP tubes with my new replacements. THEY MUST BOTH BE THE SAME LENGTH.

Left side:

Right side with the bend going around my crank case breather filter:

Time will tell on this one. Hopefully this resolved the cutting out issue as besides that the bike is running great and absolutely screams with all the mods.

I'm hoping to visit the dyno here soon to do some partial throttle runs so I can send the data to TTP for a customized tune. Stay tuned.

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post #133 of 145 (permalink) Old 04-03-2019, 08:08 AM
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Quote:
Originally Posted by yrunvs View Post
I've always wondered how long JB Weld would hold up in an oil bath?
Well past the life of the engine with no problems.
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post #134 of 145 (permalink) Old 04-04-2019, 08:10 PM Thread Starter
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Quick update on my "catch can" solution. Went on about a 40 mile ride today and it appears to be working exactly as I intended. Not a drop of oil on the bike around the filter and a small amount of oil in the "can". Should be several hundred miles or more before I have to empty it out which I can totally live with.

Nice clean bike bits:

Tiny amount of oil in the can:

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post #135 of 145 (permalink) Old 04-04-2019, 09:23 PM
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This build and your excellent dialog continues to be entertaining and informative, great job here, thanks!
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post #136 of 145 (permalink) Old 04-04-2019, 11:23 PM Thread Starter
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This build and your excellent dialog continues to be entertaining and informative, great job here, thanks!
Thank you Denis for continuing to follow along. When I started this thread three years ago I never imagined it'd turn into this. Who knew I could jabber on and on this much lol! I know I've gained a ton of knowledge from this forum. Hopefully others will find this thread informative as well.
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post #137 of 145 (permalink) Old 04-13-2019, 03:18 PM Thread Starter
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I've got my dyno date set for the 23rd. In preparation for that I've removed the exhaust in order to have a m18x1.5 o2 bung welded on so we can have the wideband right in the exhaust and not have to rely on one of those tail pipe sniffers.

Since the bike is on the stand and the exhaust is off I decided to install the up and over rear brake caliper relocation bracket I purchased from TTP. I'd like to provide a link but they are no longer offering them for sale. I purchased the last one. A shame really as it's a beautiful piece of machine work.

Install is not too difficult. This will require the removal of the rear wheel. I found that the OEM brake line works fine with plenty of length since I have removed the factory airbox. I just re-routed it on a more direct patch toward the rear of the bike. Here she is mounted up:

Because the caliper is rotated the bleed screw is no longer is the best position to evacuate all the air out of the line. I use a mityvac for bleeding purposes which helps. To ensure all the air ends up at the bleed screw I just suspended the caliper with a zip tie from the frame tube above like so:

Here's a handy place for the bleeder bottle since I removed the exhaust and a third hand wasn't available.

And finally here's a couple shots of everything bolted back up. This will make my stand a lot easier to use. Before relocating the caliper it was always hitting on the stand. Also makes checking on the caliper a lot easier.


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post #138 of 145 (permalink) Old 04-15-2019, 09:23 PM Thread Starter
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Here's a few beauty shots from the St Pete Festivals of Speed last weekend.




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post #139 of 145 (permalink) Old 04-24-2019, 12:46 AM Thread Starter
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Well boys and girls, dyno session is in the books.

In preparation for the session I decided to weld a bung in so we could have the wideband right in the exhaust to get the most accurate readings. Install is on the crossover pipe toward the right side header pipe.


With wideband installed for the dyno runs:

The TTP remote fine tune requires several partial throttle runs. I used TuneECU to read the TPS sensor so I could index the throttle. Here's a shot of my makeshift pointer made out of zip ties:

With all that done we strapped her to the dyno and here are the results.

100% throttle runs:

Peak numbers are right in line with what's published on the TTP website. She does seem to be really rich off idle past 3k RPMs then transitions to really lean up to about 5500 RPMs. I've emailed all the run files to Mike at TTP so they can do their remote fine tune. Once they get the fueling adjusted I'll put her back on the dyno and see what the final numbers are.
I was hoping to crack 90 horsepower with the headwork in addition to the 904s kit and cams. I'm wondering if the restriction here is the OEM throttle bodies. Maybe I've reached their flow limit. I'll check with Mike on that as well. Might be sending them to him for their TB boring service in the future...

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post #140 of 145 (permalink) Old 04-24-2019, 05:28 PM
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Cool looking bike with the go to match the show.

your 100% throttle A/F trace on the dyno runs looks very good (almost perfect), the rich dip where the dyno operator opened the throttle to wide open is to be expected and nothing to worry about.
even the lean area from 4k to 5.5k is ok, if you look at the hp and torque curves they don't dip in that area (just flatten out a bit, you might pick up 0.5-1hp there).

your hp and torque curve is about where i was on standard TB's (well done!) i would expect mike's 39mm bored TB's would get you another 3-5hp peak hp. and a 44mm daytona TB conversion would get you 6-10hp peak hp.

who wudda thought id wanna bonneville!
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