260 Head Pipe on 300?

[Tr1AL]

37 minutes ago, konrad said:

None.  Unfortunately, have not yet even tried.  The unit was purchased secondhand, and it came with a variety of example maps (I guess "map modifiers" would be more accurate) including the 300.  The concept is the same as that used on Honda's EFI MX bikes. 

Sorry for the hijack, mcman56.

You have not hijacked anything what you are talking about relates to what mick mcmanus is wanting resolved. 

[mcman56]

I'm in the US.  Are those top hat pieces aluminium or steel?  I assume the ones from the original bike were made for the smaller head pipe so would not fit but I could make new ones.  If it reduced the 26 mm pipe to 18, maybe 22 mmm would be appriate for the 30 mm 300 exhaust?  That would equal the same 50% reduction in area which seems quite large.

I don't see the pipe avilable but it sounds like a pricy experiment.  I did spend some time looking for the software and dongle to tune the engine.  It was unclear if what I found would work work for this bike.  If you are interested in selling the used unit, PM me.  I also found this link but it looks like they just sell maps and just for max power.  It does not mention hardware.

https://oldskulltuning.com/montesa-cota-4rt-keihin-tuning-maps/  

[lemur]

13 hours ago, mcman56 said:

I'm in the US.  Are those top hat pieces aluminium or steel? 

Stainless steel and the same size as my size 8 wedding ring.  Too bad you don't reside in Canada I have all that stuff sitting in my spare parts drawer, if you lived local I'd give it all to you to mess with.  I think altering the fuel mapping on the 4RT would be a complete waste of effort considering the stock fuel mapping does not need to be changed when you remove all the mechanical intake and exhaust restrictors, it sorts itself out just fine.  The fuel injection works great corked or uncorked, they just have less power response when they are corked so why would you want to mess with the fuel to air ratios. I had one 4RT with the 2 position map switch and left it in high or dry power setting all the time, same as with my TRS machines more power is better, I think all the map switch changes is to slightly alter the ignition timing, like an ignition advance. 

[lemur]

I owned 3 Montesa bikes at the same time, a 250, a 260 and a 300.  I swapped out parts assemblies between all of them to trouble-shoot issues at one point and I found that absolutely everything was interchangeable without causing issues.

[Tr1AL]

5 hours ago, lemur said:

I owned 3 Montesa bikes at the same time, a 250, a 260 and a 300.  I swapped out parts assemblies between all of them to trouble-shoot issues at one point and I found that absolutely everything was interchangeable without causing issues.

You are just one of those types who makes everything straight forward and easy , why would any one want to do that when he can search for and then  fit the full Scavini system at a cost of $550.00 , buy the HRC programmable  ECU for  $2000.00 buy the cables and software for $1000.00 after searching for it for a year and then get Rick Wakeman to play it all until it sounds right . I just don't get it.

[lemur]

 

33 minutes ago, Tr1AL said:

You are just one of those types who makes everything straight forward and easy , why would any one want to do that when he can search for and then  fit the full Scavini system at a cost of $550.00 , buy the HRC programmable  ECU for  $2000.00 buy the cables and software for $1000.00 after searching for it for a year and then get Rick Wakeman to play it all until it sounds right . I just don't get it.

Poor fella lives in the USA the tariffs he would need to pay would be astronomical and impossible to calculate. 

[Tr1AL]

37 minutes ago, lemur said:

 

Poor fella lives in the USA the tariffs he would need to pay would be astronomical and impossible to calculate. 

Would not touch his pocket though .Tariffs are never passed onto the buyer, importers and exporters just suck it up.  it works  just like minimum wage increases so nothing to worry about.

[lemur]

42 minutes ago, Tr1AL said:

Would not touch his pocket though .Tariffs are never passed onto the buyer, importers and exporters just suck it up.  it works  just like minimum wage increases so nothing to worry about.

What if I give him a 4000% discount  🤔

[Tr1AL]

33 minutes ago, lemur said:

What if I give him a 4000% discount  🤔

Give him 10,000% anything is possible. 🤑

[mcman56]

I keep hearing about tarrifs but have yet to see any personal impact.  What do people in other countries see?  When ordering from the UK, prices are less VAT with no import duties.  The last time I ordered something was about a month ago.  However, last year I sent a swingarm to the UK for repair.  It got stuck in UK customs for several weeks.  It ended up costing a total of $100 with import duties and fees to get in the country.  This really surprised me.  Is that normal?   There were no US customs cost when it came back.