Factory TPI throttle body

dcg141
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dcg141
Edited Date/Time 8/17/2021 12:29pm

When I got to the TKO I found out that engines, wiring harnesses, throttle bodies and suspension were held up in customs but were on their way. Bikes were stripped down to wheels and frames. Saturday mid day the bikes were being assembled and I got a pic of the throttle body for Lettenbichler’s bike. You can see 2 injectors in the TB.
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Broseph
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Broseph 8/16/2021 10:31am
8/16/2021 10:31am
dcg141 wrote:
[img]https://p.vitalmx.com/photos/forums/2021/08/16/505906/s1200_6A96D7D8_470C_430C_A3FC_23C381B9738C.jpg[/img] When I got to the TKO I found out that engines, wiring harnesses, throttle bodies and suspension were held up in customs but were on...

When I got to the TKO I found out that engines, wiring harnesses, throttle bodies and suspension were held up in customs but were on their way. Bikes were stripped down to wheels and frames. Saturday mid day the bikes were being assembled and I got a pic of the throttle body for Lettenbichler’s bike. You can see 2 injectors in the TB.
Blink No TPI!
Jack_Mehoff
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Jack_Mehoff 8/16/2021 10:49am
8/16/2021 10:49am
Are they injecting fuel directly into the throttlebody instead of using the TPI System or is that just an oil injector?
dcg141
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dcg141 8/16/2021 10:52am
8/16/2021 10:52am
Its fuel. The 2 TPI injectors were still on the engine but had a hose running to each other and not the fuel system. They were kept there instead of blocking them off to give a stock appearance.
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dcg141
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dcg141 8/16/2021 10:54am
8/16/2021 10:54am Edited Date/Time 8/16/2021 2:41pm
Broseph wrote:
Blink No TPI!
Not anymore. That's throttle body injected like the 4 stroke.
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LungButter
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LungButter 8/16/2021 10:59am
8/16/2021 10:59am
Why is this better?
Johnny Depp
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Johnny Depp 8/16/2021 11:00am
8/16/2021 11:00am Edited Date/Time 8/16/2021 12:20pm
Excellent spy work DCG! I would expect what we are seeing will be standard on the 23’s? Now if we could just get someone to post up a photo of Boger’s MXGP bike, you might have a clue what’s going on with the new chassis.
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dcg141
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dcg141 8/16/2021 12:02pm
8/16/2021 12:02pm
LungButter wrote:
Why is this better?
Further development from racing I assume. GET has a kit to put the stock injectors in front of the TB with their intake.
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Johnny Depp
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Johnny Depp 8/16/2021 12:22pm
8/16/2021 12:22pm
LungButter wrote:
Why is this better?
dcg141 wrote:
Further development from racing I assume. GET has a kit to put the stock injectors in front of the TB with their intake.
Dual injectors are able to provide different adjustments for different RPM ranges. Surprised we don’t see more of them on 4t’s. No oil injection is a big benefit for weight.
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metal_miracle 8/16/2021 12:30pm
8/16/2021 12:30pm
Could n`t this be a test for the mx model. To share as many componets across the board.
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WoodsRacer 8/16/2021 1:04pm
8/16/2021 1:04pm Edited Date/Time 8/16/2021 1:05pm
LungButter wrote:
Why is this better?
2 items come to mind.

First 2 strokes have a high fuel flow range, and injectors struggle with having enough flow at peak power but then also enough turn down ratio to also still idle. One way around this is with multiple injectors per cylinder that stack on top of one another, enough flow up top and can turn one completely off to have enough turn down on the bottom end.

The second item is piston cooling. When fuel is entered at the throttle it then goes through the case and helps cool the underside of the piston. This effect is lost on DI and TPI engines.
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agn5008
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agn5008 8/16/2021 1:22pm
8/16/2021 1:22pm
Crossup wrote:
The factory guys that had that set up for over a year.

Aftermarket companies are offering the kits.
https://www.bestdualsportbikes.com/fuel-injector-relocation-block-tpi
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
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Pirate421
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Pirate421 8/16/2021 2:49pm
8/16/2021 2:49pm
I wonder if the new system will be compatible with the older tpi’s or if the get system will be close enough to what’s coming out. This is one of the things I was worried about when buying my 2020 was that this system would become obsolete and it would be a generation that would be hard to sell.
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Johnny Depp 8/16/2021 3:20pm
8/16/2021 3:20pm
Pirate421 wrote:
I wonder if the new system will be compatible with the older tpi’s or if the get system will be close enough to what’s coming out...
I wonder if the new system will be compatible with the older tpi’s or if the get system will be close enough to what’s coming out. This is one of the things I was worried about when buying my 2020 was that this system would become obsolete and it would be a generation that would be hard to sell.
Sure looks like they bolted it on.
agn5008
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agn5008 8/16/2021 4:08pm
8/16/2021 4:08pm
Crossup wrote:
The factory guys that had that set up for over a year.

Aftermarket companies are offering the kits.
https://www.bestdualsportbikes.com/fuel-injector-relocation-block-tpi
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
I don’t understand the downvote. Maybe answer the question?
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Johnny Depp
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Johnny Depp 8/16/2021 4:15pm
8/16/2021 4:15pm
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if you wanted to do some DIY engineering.
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agn5008
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agn5008 8/16/2021 4:19pm
8/16/2021 4:19pm
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
Johnny Depp wrote:
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if...
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if you wanted to do some DIY engineering.
I can order it on that link that Crossup posted and I quoted. Unless I’m missing something here it seems to be available to purchase.
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Broseph
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Broseph 8/16/2021 4:25pm
8/16/2021 4:25pm
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
Johnny Depp wrote:
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if...
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if you wanted to do some DIY engineering.
He was asking about this:

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agn5008
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agn5008 8/16/2021 4:31pm
8/16/2021 4:31pm
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
Johnny Depp wrote:
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if...
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if you wanted to do some DIY engineering.
Broseph wrote:
He was asking about this: [img]https://p.vitalmx.com/photos/forums/2021/08/16/505984/s1200_BC064B7B_C3B0_4AA6_BAB7_0106FC550A15.jpg[/img]
He was asking about this:

Correct. Which is why I quoted Crossups post 🤷‍♂️ Oh well. If anyone has experience using one of these I would love some input.
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Johnny Depp
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Johnny Depp 8/16/2021 4:58pm
8/16/2021 4:58pm
Johnny Depp wrote:
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if...
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if you wanted to do some DIY engineering.
Broseph wrote:
He was asking about this: [img]https://p.vitalmx.com/photos/forums/2021/08/16/505984/s1200_BC064B7B_C3B0_4AA6_BAB7_0106FC550A15.jpg[/img]
He was asking about this:

agn5008 wrote:
Correct. Which is why I quoted Crossups post 🤷‍♂️ Oh well. If anyone has experience using one of these I would love some input.
Sorry, I missed that completely. Not sure if he added it after the fact, I didn’t go to the top and reread. Very interesting reading on that link, first I’ve heard of it.
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Broseph
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Broseph 8/16/2021 5:05pm
8/16/2021 5:05pm Edited Date/Time 8/16/2021 5:08pm
Broseph wrote:
He was asking about this: [img]https://p.vitalmx.com/photos/forums/2021/08/16/505984/s1200_BC064B7B_C3B0_4AA6_BAB7_0106FC550A15.jpg[/img]
He was asking about this:

agn5008 wrote:
Correct. Which is why I quoted Crossups post 🤷‍♂️ Oh well. If anyone has experience using one of these I would love some input.
Johnny Depp wrote:
Sorry, I missed that completely. Not sure if he added it after the fact, I didn’t go to the top and reread. Very interesting reading on...
Sorry, I missed that completely. Not sure if he added it after the fact, I didn’t go to the top and reread. Very interesting reading on that link, first I’ve heard of it.
The Best Dual Sport guy is a bit if a snake oil salesman. But his relocation block does look pretty good. GET also sells a relocation block, but it uses the stock dual fuel lines. Not quite as clean as the integrated fuel rail on the Best Dual Sport Bikes version.

Guys have reported the relocation blocks adding a little bark back into the throttle response, similar to a carb. Must be something about having the crankcase primed and ready with mixed fuel and air?
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Johnny Depp
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Johnny Depp 8/16/2021 6:03pm
8/16/2021 6:03pm Edited Date/Time 8/16/2021 6:04pm
Seems to have a lot to do with reliability, and getting oil into a cold start engine.
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Crossup
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Crossup 8/16/2021 8:17pm
8/16/2021 8:17pm Edited Date/Time 8/16/2021 8:18pm
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
Johnny Depp wrote:
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if...
The downvote is because this product is not available on the market yet, so how could you buy it? You could possibly create your own if you wanted to do some DIY engineering.
There are several companies in Europe offering those injector block kits. The Facebook TPI groups have been posting them for a year.
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Crossup
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Crossup 8/16/2021 8:19pm
8/16/2021 8:19pm
agn5008 wrote:
Correct. Which is why I quoted Crossups post 🤷‍♂️ Oh well. If anyone has experience using one of these I would love some input.
Johnny Depp wrote:
Sorry, I missed that completely. Not sure if he added it after the fact, I didn’t go to the top and reread. Very interesting reading on...
Sorry, I missed that completely. Not sure if he added it after the fact, I didn’t go to the top and reread. Very interesting reading on that link, first I’ve heard of it.
Broseph wrote:
The Best Dual Sport guy is a bit if a snake oil salesman. But his relocation block does look pretty good. GET also sells a relocation...
The Best Dual Sport guy is a bit if a snake oil salesman. But his relocation block does look pretty good. GET also sells a relocation block, but it uses the stock dual fuel lines. Not quite as clean as the integrated fuel rail on the Best Dual Sport Bikes version.

Guys have reported the relocation blocks adding a little bark back into the throttle response, similar to a carb. Must be something about having the crankcase primed and ready with mixed fuel and air?
I have his clutch weight and it is great. Crappy business name though IMO.
Crossup
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Crossup 8/16/2021 8:30pm
8/16/2021 8:30pm
Crossup wrote:
The factory guys that had that set up for over a year.

Aftermarket companies are offering the kits.
https://www.bestdualsportbikes.com/fuel-injector-relocation-block-tpi
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
Sorry I missed your post. I do not have the injector block kit. I have read that people that have made the switch say the throttle is more responsive (no bog)

The setup does also get oil in the cylinder on startup. But if you half-crank your kick starter with your hand before starting, the pump comes on and injects oil, then you can hit the start button and turn over the engine.

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CKNY
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CKNY 8/17/2021 3:40am
8/17/2021 3:40am
Crossup wrote:
The factory guys that had that set up for over a year.

Aftermarket companies are offering the kits.
https://www.bestdualsportbikes.com/fuel-injector-relocation-block-tpi
agn5008 wrote:
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace...
Is a product like this worth purchasing? It says it makes the idle screw more adjustable. So if I buy this then will this essentially replace having the slavens idle screw mod?
Crossup wrote:
Sorry I missed your post. I do not have the injector block kit. I have read that people that have made the switch say the throttle...
Sorry I missed your post. I do not have the injector block kit. I have read that people that have made the switch say the throttle is more responsive (no bog)

The setup does also get oil in the cylinder on startup. But if you half-crank your kick starter with your hand before starting, the pump comes on and injects oil, then you can hit the start button and turn over the engine.

You can do the same with the starter button. This set up is old news. Many of the factory bikes have been testing the new system in several variations. Some running oil pump, some running premix.
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dcg141
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dcg141 8/17/2021 10:16am
8/17/2021 10:16am Edited Date/Time 8/17/2021 10:18am
Hard Enduro has been the best thing to happen to 2 strokes. Having a full on factory race program based on 2 stroke platforms means constant development.
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sandhills
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sandhills 8/17/2021 12:29pm
8/17/2021 12:29pm
Broseph wrote:
The Best Dual Sport guy is a bit if a snake oil salesman. But his relocation block does look pretty good. GET also sells a relocation...
The Best Dual Sport guy is a bit if a snake oil salesman. But his relocation block does look pretty good. GET also sells a relocation block, but it uses the stock dual fuel lines. Not quite as clean as the integrated fuel rail on the Best Dual Sport Bikes version.

Guys have reported the relocation blocks adding a little bark back into the throttle response, similar to a carb. Must be something about having the crankcase primed and ready with mixed fuel and air?
I got the snake oil vibe from him explaining how oil needs to get into the cylinder to lubricate the cylinder walls - that's not how it works, the piston and cylinder wall is lubricated from underneath even on a 2 stroke.

But if the product works it doesn't really matter if he describes it wrong.
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