Yamaha VMX12H Supplementary Service Manual page 365

V- B O O ST SYSTEM
O perat i on
Ther e i s a l ag i n t i m e bet w een t he st ar t i ng of t he
ser vo m ot or and t he openi ng of t he but t er f l y
val ves. Thi s l ag i s caused by a sl ack pr ovi ded
w i t h t he cont r ol cam e.
Ther ef or e, t he ser vo m ot or st ar t s t o oper at e at
5, 730 engi ne r / m i n but t he val ves begi ne t o open
at 6, 000 r / m i n.
B at t er y
M ai n sw i t ch
Fuse
V- boost val ve cont r ol uni t
Pot ent i om et er
D r i ve pul l ey
Vacancy
B ut t er f l y vl ave
Reduct i on gear
1
Servo m ot or
l gni t or uni t
Val ve angl e i nf or m at i on
B M ot or dri ve
R evol ut i on i nf or m at i on
7- 62