Power restrictions on 1VJ for CH Market?
 

I have Tenere 1VJ for Switzerland market (chassis number starts with 1VK*).

I had to put +5 teeth on rear sprocket just to be able to drive bike loaded with me and girlfriend. Bike feels like dead horse :) I also own XT 4PT and that bike runs much better, and 4PT should be about 10HP weaker than 1VJ.

Tenere has new piston, cilinder, carb is cleaned, new sparkplug,... now by best guess is that Tenere for CH market has some power restriction. If so, does anyone know how to remove that restriction?

Thanks

I have found where is the difference between regular 1VJ and 1VK (for CH market). Diffs can be found in this pdf http://www.tenere.ch/manuals/XT600Z86.pdf

Main difference is in jets and needles in carb (Teikei Y27PV);

1VJ:
Primary carb: main jet - 145, needle 5C41
Secondary carb: main jet - 135, needle 5X72-3/5

1VK:
Primary carb: main jet - 135, needle 5C42-3/5
Secondary carb: main jet - 116, needle 5X72-3/5

My question is where can I buy this jets and needles? Does jets can be fitted from Keihin or Mikuni karbs?

Hiya,
surprised that you haven't received any replies to your questions here on the Hubb, and well done on finding that web site and PDF, here is another one that may aid you (and others) with the bikes you have.

Yamaha - Европа

If you look at old postings here, I'm sure you will find other information on who and where, for parts. The site posted above, appear to give prices, but they tend to be rather high. As I say there are plenty of others who sell parts for these bikes EG; try "wemoto" here in the sunny:stormy: UK.
There is of course David Lambeth 00 44 (0)1205 871945 | Rally & Overland Specialist who is rather knowledgeable on all things xt.

Good luck
Socks

Thanks for answer.

Does anyone know is there big difference between needle 5C41 and 5C42? It seems that even Yamaha dealers cant get carb needles.

I would change Carb-setup as follows:
Primary carb: main jet 150, needle 5C42, Clip 3rd pos. from bottom.
Secondary carb: main jet 125, needle 5X72, clip also 3rd pos.

Source to get parts: KEDO - Performance Products

The swiss setup is lean according to their laws (no EU).

But I don't think that this helps to solve the power problem.
How much power does the reg.paper say?

The different carb setup is just one step to get the bike registered in Switzerland. Don't know it for XT's, but on a lot of other bikes Yamaha used also less powerful CDI's

Check CDI-unit and intake rubbers for ID-numbers.
If you find a number starting with 1VK, than it will be for sure something with less power.

Good luck

...........forgot this:

check cylinder for ID-number.

A special version of this Tenere had been sold in Austria and Switzerland
with 500ccm which costs 6 horsepowers.

I have found needle and jets from one Croatian Yamaha dealer. Prices are 7€ for jets and 35€ for needle.

I have checked cilinder, it's normal 595ccm, intake rubbers are changed last winter and are "normal". Later today I will check CDI, hope that CDI is not the restricted, because I know that CDI is not cheap to replace.

Thanks

Hej,

according to Yamaha parts catalogue the CDI for 1VK is 1VJ-85540-50
Looks like the regular one for 1VJ - no less of power with this one.

You find the electronic parts catalogue (EPC) here:

Yamaha Online Ersatzteilkatalog für Motorräder und Roller