Tomos BT90 project

[Ping]

[quote="pomartin"]update
i got crankshafts, some stickers and outside part of engine is half way pollished.
at the moment i do not have time for this... we got final exams in school and it ends 6.9.... so till then, this would be it



Is this crankshaft really black ?
If so , can you tell us more about it ?
Is it a special brand , it looks like a hardend type of crankshaft.

[pomartin]

it is not black.. it joust seems on picture.
this is copy of CTX crankshaft, made in serbia, the other ones are original CTX. Originals are a bit better than copies, but the problem is that there is almost no good CTX original ctankshaft.
all of them have racing bearings

[2pac]

Oke

I wanna buy a ctx 90 or 80 engine but i cant find it so are they so special in your country?

[pomartin]

ctx is 80
e90 is 90

well, there is no such a problem finding an engine... but they are a bit expensive.. around 250 and 300€.. it depends on its condition

[pomartin]

little update
There is a change in styling.
CTX rear forks with mono-amortizer .. and all what needs to be modificated

[Alex..]

as always looking nice

id really like to see it finished

ps: do you know which gasoline/oil ratio you need for BT-Cyl, some say 1:20/1:25 and other just 1:40 , 1:45

[pomartin]

3% of oil is usual ok.
If you use some cheap mark or non-syntetic oil i would reccomend 4%
with motul 710 (or better) is 2,5% enough.
And main rule: better too much than too few

hehe i would like to see it finished too... its about time.. 26.6. will be exactly 8 months from when i started

[2pac]

Okay 50x1,04 =52 that is 2 liter oil in 50 liter is" 1:25 "

[brombertje]

4% is indeed 1:25
With good oil 2,5% - 3% (1:40- 1:35) is enough.
By the way, looks very nice.

[pomartin]

tnx
I will start working on it again on friday, couse in thurstday we have last final exam

[brombertje]

Good luck with the exam!

[2pac]

yes good luck

i hope you finnish it
Than you can make alot of money for more intresting projects

[pomartin]

Thanks

good thing is that school will be over, bad thing is that ill have to move in another city where that school is, so ill be able to work on projects only in weekends .. till i find some garage or something in that city