JKEXER Acute 3925 User manual

RACING BIKE
Acute 3925
SEMI-COMMERCIAL
Owner's Manual
Made in Taiwan

INDEX
IMPORTANT SAFETY INFORMATION . . . . . . . . . . . . . . . P. 2
ASSEMBLY PARTS LIST . . . . . . . . . . . . . . . . . . . . . . P. 3
ASSEMBLY INSTRUCTION . . . . . . . . . . . . . . . . . . . . . P. 4-5
OPERATING INSTRUCTION . . . . . . . . . . . . . . . . . . . . P. 6-7
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 8
EXPLODED DRAWING . . . . . . . . . . . . . . . . . . . . . . . P. 9
DANGER Check that all items are complete and in good
condition.
WARNING In the assembly of the bolts, it is recommended that
one should use one's hand in tightening the bolts
prior to its completion. Once completed remember
to have all the bolts securely fastened to prevent
accident.
ATTENTION Be sure to carefully follow all the steps in our
assembly instruction.
CAUTION:
!
!
!

2
IMPORTANT SAFETY INFORMATIONS
WARNING:
Before starting any exercise program, it is recommended that you consult your
physician, especially for persons with pre-existing health problems. Before using the
new equipment, please review this manual to learn about the features, functions, and
safety operations. Should you experience any irregular physical conditions such as
dizziness, severe muscle or joint pain, pain in your chest or should any other symptoms
appear: STOP EXERCISING and consult with your physician immediately.
1. Read all instructions in this manual before using this equipment. It is the owner’s
responsibility to ensure that all users of this equipment are thoroughly informed of all
warnings and precautions. Use this equipment for its intended use as described in this
manual.
2. Securely tighten all nuts and bolts and inspect and tighten all parts each time you use the
equipment. **Replace any worn parts immediately and if you find that any repairs are
needed, please keep the equipment out of use until repair.**
3. Inspect the Crank Arms and Pedals daily for any signs of stress fatigue, and check Brake
Pads for its wear periodically. The safety level of the equipment can be maintained only if it
is examined regularly for damage and wear.
4. Press down on the red emergency brake lever under the tension knob to STOP cycling
immediately.
5. The equipment should only be used on a level surface and is designed for indoor use only.
6. Warm up before you start exercising to prevent injuries
7. No more than one person should operate the equipment at one time.
8. It is recommended that you do not initiate any type of exercising within 40 minutes after a
meal.
9. Keep small children and pets away from the equipment at all times
10. Appropriate clothing should be worn while exercising. Never wear loose clothing that could
be caught in moving parts. It is recommended that athletic support clothing be worn for both
men and women. Athletic shoes should always be worn while exercising. DO NOT USE
with bare feet, wearing sandals, or wearing only socks or stockings.
11. The user’s max weight to operate the equipment is 150kg / 330 lbs.
12. DO NOT USE the equipment around water or while you are wet. Using the unit around a
pool, hot tub or sauna will void the warranty and is potentially hazardous.
13. The equipment is NOT suitable for medical/therapeutic use.

3
Assembly Parts List
1
F
E
4
G
H
9J
3
2
AB
ASSEMBLY PARTS LIST
1. MAIN FRAME .............................. 1
2. FRONT STABILIZER ........................ 1
3. REAR STABILIZER ......................... 1
4. SEAT POST ............................... 1
5. SEAT SLIDER.............................. 1
6. HANDLE BAR ............................. 1
7. HANDLEBAR POST ........................ 1
8. BOTTLE SET .............................. 1
9. PEDAL ................................... 2
10. SEAT .................................... 1
A. BOLT & WASHER....................... 4+4+4
B. TOOLS ................................... 3

4
Step 1
Secure FRONT STABILIZER to MAIN
FRAME using allen head bolts .
Step 3
Slide the SEAT SLIDER into the SEAT
POST, then insert SEAT POST into rear
top of MAIN FRAME, fixed by knob.
Step 2
Secure REAR STABILIZER to MAIN
FRAME using allen head bolts .
SEAT
SLIDER
SEAT POST
SEAT
STOPPER
MAIN FRAME
REAR
STABILIZER
MAIN
FRAME
Assembly Instruction
Step 4
Loose and remove the STOPPER from
the SEAT SLIDER, as to insert the SEAT
SLIDER into the SEAT bottom, then screw
the STOPPER onto the SEAT SLIDER
again. Please make sure the SEAT has bee
fixed firmly by tightening the Seat Bracket
bolts with tool as provided.
MAIN FRAME
FRONT
STABILIZER
SEAT
SLIDER
SEAT POST

5
MAIN
FRAME
HANDLEBAR
POST
HANDLEBAR
POST
HANDLEBAR
Step 7
Firmly screw each PEDAL into the cranks.
Please check for the letters L for
left pedal or R for right pedal.
Step 8
Fix BOTTLE CAGE by screwing bolts on
fork. Then put water BOTTLE into the
bottle cage.
Step 6
Securely fix the HANDLEBAR to the top
of HANDLEBAR POST by using BOLT
and WASHER(A) .
Step 5
Insert HANDLEBAR POST into front top
of the MAIN FRAME , fixed by knob .
Assembly Instruction
After the bike is assembled, suggest you to use family use stationary standard
tools to tighten two pedals again to make sure they are securely tightened.

6
RESISTANCE ADJUSTMENT:
Pedalling resistance is controlled by the tension knob located under the handlebar. To
increase resistance, turn the tension knob clockwise. To decrease resistance, turn the
tension knob counter clockwise.
SPECIAL NOTICE:
Every time before riding, make sure both pedals are securely tightened.
After finishing riding, use a dry rag to clean sweat and dust off for the whole unit.
Especially please clean the flywheel, all the metal tube and parts to avoid rusting.
SEAT ADJUSTMENT:
Proper seat adjustment is critical to exercise
efficiently and avoid the risk of injury. To
determine whether the seat is properly, adjust
seat on the exercise bike, place one pedal in
the down position and enter your foot over the
center of the pedal. Your leg should be only
slightly bent. If you are stretching or your leg
isn't extended sufficiently the seat should be
adjusted as required.
After adjusting it is very important to make sure
that the seat locking pin is securely locked into
position.
1. To adjust the height of seat simply turn the
ADJUSTABLE KNOB loose. Then pull the
knob and move the seat up or down to the
desired height. (there are different seat
height positions) .
2. To adjust the seat position. Turn the fixing knob loose then pull the knob to move the
seat to the desired position. After adjusting it is very important to make sure that the
seat locking pin is securely locked into position.
HANDLEBAR ADJUSTMENT:
To adjust height of handlebar, simply turn
the ADJUSTABLE KNOB loose then pull the
knob and move handlebar post up or down
to the desired height. There are 6 holes for
adjustment.
Operating Instruction

7
Operating Instruction
LEVELING:
After completing the installation, if the floor/equipment is not even, turn the FOOT PAD
to the desired level in order to balance the frame.
CHAIN ADJUSTMENT:
The chain on this bike has been pre-adjusted and should not require immediate
attention. Continuously use of bike may cause the chain become loose and need to be
adjusted.
When to adjust chain:
1. In riding the bike, if you found swing of chain that caused noise that meant chain
was too loose. If it is too loose, it not only causes noise, but chain might fall loose
from the frame.
2. If you rode the bike without putting any break on the wheel but found some tension
on the bike that meant the chain was too tight. It will cause more friction and become
easily worn out between chain and related parts.
How to adjust for loose (tight) chain:
1. Use tool to loosen the Nut (2J) on two sides.
2. For loose (tight) chain, slightly tighten the Nut (2I) on the right side by 1 or 2 turn
clockwise (counterclockwise). Then also slightly tighten (loosen) the Nut (2I) on the
left side. Make sure flywheel is straight at the center of frame, then tighten the Nut
(2J) on the right.
3. Ride the bike and repeat procedure 2 to see if you feel comfortable about the
movement of the chain.
4. Make sure the Nut (2J) on the right side is securely tightened and the flywheel is at
the center, then tighten the Nut (2J) on the left side.
Right Side
Left Side
SPECIAL NOTICE:
1. Every time before riding, make sure both pedals are securely tightened.
2. After finishing riding, use a dry rag to clean sweat and dust off for the whole unit.
Especially please clean the flywheel, all the metal tube and parts to avoid rusting.

8
No. Description Q'ty No. Description Q'ty
Parts List
1 Frame 1
2 Flywheel Ø460x19kg 1
2A Bushing Ø12.7x56.5L 1
2B Axle 1
2C Bearing #6000 2
2D Washer Ø18xØ8x3.7T 1
2E Nut 3/8'x26x17x4T 2
2F Washer Ø10xØ20x3T 4
2G Screw M6x57L 2
2H Washer M6x13 2
2I Nut M6 2
2J Dome Nut 3/8'x26 2
2K Chain Wheel 1
2L Washer 1
2M Nut 1
2N Bushing Ø12.8x36.5L 1
3 Front Stabilizer 1
4 Rear Stabilizer 1
5 End Cap 40 x 80 4
6 Butterfly Nut M8 BK 4
7 Foot Pad 4
8 Moving Wheel Ø65 PU 2
9 Hex Bolt 3/8'x50L 2
9A Washer Ø10xØ20x2T 2
10 Nut 3/8' 2
11 Carriage Bolt M8x55L 4
12 Washer Ø8xØ16x1.5T 8
13 Dome Nut M8 4
14 Handlebar 1
14A Spring Washer M8 4
14B Allen Head Bolt Mx16L 4
15 Handlebar Post 1
18 Sleeve 40x80 2
19 Seat 1
20 Seat Bar 1
20A End Cap 1
20B Seat Bar Sleeve 1
20C Screw 1
21 Seat Post 1
22 Knob M16x25mm 2
23 Spacer 1
23A Knob M16x15mm 1
24 Tension Knob M8x50L 1
25 Emergency Brake 1
26 Rubber Washer 1
27 Butterfly Nut 1
28 Nut M8 1
29 Brake Cable 2
30 Caliper Brake 1
31 Brake Pad 2
32 Screw M6x18L 1
33 Nylon nut M6 1
34 Axle / Chain Wheel 1
35 Bearing 6004 2
36 Bushing Ø25.4x20.2x42L 1
37 Nut M20 1
38 Inner Chain Cover 1
40 Chain 1
41 Outer Chain Cover 1
42 Right Crank 1
44 Left Crank 1
45 Crank Bolt M8x1.0x20 2
46 Washer Ø20xØ10.2x1T 2
47R Right Pedal 1
47L Left Pedal 1
48 Screw M4x15L 9
49 Protect Plastic Cover 1
50 Screw M4x10L 2
51R Right Fender 1
51L Left Fender 1
52 Screw M4x10L 5
53 Flywheel Plastic Cover 1
54 Screw M5x10L 1
55 Water Bottle Holder 1
56 Screw 2
57 Water Bottle 1
59
Upper Fender
1
59A
Screw
2
60
Plastic Cover
1
61
TPR Cover
1
62
M6 Bolt
1
63
M6 Nut
1

9
Exploded Drawing

Factory:
JIH KAO ENTERPRISE CO., LTD